Mix it Up: Combining Liquids of Different Temperature
|
|
|
- Jeffry Ford
- 6 years ago
- Views:
Transcription
1 Activity 7 Mix it Up: Combining Liquids of Different Temperature Suppose that a hot drink and a cold drink are mixed together and you would like to predict the temperature of the mixture. To do this, you need to know the temperatures of the drinks before they are mixed, T 1 and T 2, and the volumes of each used in the mixture, V 1 and V 2. A visual representation of the problem is shown below, where T m represents the temperature of the mixture: T m T 1 T 2 Translated into mathematical symbols, we have V 1 V 2 V 1 V 2 ( V ) T m 1V 1 T2V 2 = T 1 In this activity you will use the concepts described above to predict the resulting temperature when two solutions of different temperatures are mixed. The data needed to perform these calculations will be collected using a pair of temperature probes. OBJECTIVES Record temperatures of water samples before and after mixing. Compare the mixing temperatures to a linear prediction. MATERIALS TI-84 Plus or TI-84 Plus Silver Edition graphing calculator Vernier EasyTemp Vernier EasyData application graduated measuring cup (in ml) styrofoam cups or coffee mugs hot and cold water Modified from and reproduced with permission of the publisher 2002 Texas Instruments Incorporated 7-1
2 Activity 7 PROCEDURE 1. Turn on your TI-84 Plus (or TI-84 Plus Silver Edition) graphing calculator and make sure that it is on the home screen. Plug the EasyTemp probe into the USB port of the graphing calculator. The EasyData application will automatically start and the Main screen will be displayed. 2. Select from the Main screen, and then select New. 3. To test the expression TV T V = Tm ( V ) , you will record the temperature of water in two cups and then find the temperature when the contents of the cups are mixed together. Label one cup or mug as Cup 1 and the other as Cup Fill Cup 1 with 100 ml of cold water (about 10 ºC) and Cup 2 with 150 ml of hot water (about 50 ºC). Do not put any ice in the cold water cup. 5. Put the EasyTemp probe in Cup 1. Observe the temperature readings on the Main screen. 6. When the readings are stable (0.1-level fluctuations are acceptable), record the temperature of the water in Cup 1 in the Data Table on the Data Collection and Analysis sheet. 7. Put the EasyTemp probe in Cup 2. Observe the temperature readings on the Main screen. When the readings are stable (0.1-level fluctuations are acceptable), record the temperature of the water in Cup 2 in the Data Table on the Data Collection and Analysis sheet. 8. Mix the water. Work quickly through the next steps. a. Quickly pour the contents of Cup 1 into Cup 2, keeping the EasyTemp probe in Cup 2. b. Watch the temperature reading on the Main screen. When it stops changing rapidly, record the temperature in the Data Table on the Data Collection and Analysis sheet. c. Remove the probe from the water, and discard the water. 9. Select, and then select to exit the EasyData application. ANALYSIS Answer Questions 1-7 on the Data Collection and Analysis sheet. EXTENSION Repeat the activity, this time starting with equal amounts of water in Cup 1 and Cup 2. Summarize the volumes used and temperatures measured in a data table. Based on your explanation in Question 7, how might you predict the mixture temperature, given that Cup 1 and Cup 2 contained equal volumes and knowing the temperatures T 1 and T 2? Is your prediction consistent with the measured mixture value? Modified from and reproduced with permission of the publisher 2002 Texas Instruments Incorporated 7-2
3 Activity 7 DATA COLLECTION AND ANALYSIS Name Date DATA TABLE Volumes Used (in ml) Temperatures Measured (in o C) Cup 1 (V 1 ) Cup 1 (T 1 ) Cup 2 (V 2 ) Cup 2 (T 2 ) Mixture (T m ) QUESTIONS 1. Consider the equation TV T V = Tm ( V ) related volumes and temperatures for mixed solutions. Solve this equation for the mixture temperature T m. 2. Use this result, along with the values for the initial temperatures and volumes for the water samples, to predict the temperature of the mixture. 3. How does this value compare to the measured value of T m listed in the Data Table? What might have caused the difference between the calculated and measured mixture temperature values? 4. What is the average of the cold and warm water temperatures, T 1, and T 2, used in this activity? Calculate this value and record it below: Modified from and reproduced with permission of the publisher 2002 Texas Instruments Incorporated 7-3
4 Activity 7 5. Suppose that you wish to repeat this activity under identical conditions, this time adding exactly the right amount of warm water to Cup 1 so that the mixture temperature, T m, equals the average temperature value recorded above. Should more or less warm water be added to Cup 1 for this trial compared to the amount you used in the original trial? Why? 6. Exactly what volume of warm water, V 2, should be added to Cup 1 so that the mixture temperature equals the average of T 1 and T 2? Hint: To do this, you will need to solve the mixture equation for V How does the value of V 2 found in Question 6 compare to the Cup 1 water volume, V 1? Why does using equal volumes of water ensure that the mixture temperature will be the average of the cold and warm water temperatures? Justify your answer algebraically. Hint: Let V 1 = V 2. Modified from and reproduced with permission of the publisher 2002 Texas Instruments Incorporated 7-4
5 APPLICATIONS Mix it Up 1. The directions on a box of instant cocoa tell you to prepare the drink by adding 150 ml of hot water to the package contents. What amounts of cold water (8 ºC) and boiling water (100 ºC) should be combined to add 150 ml of 68 ºC water to the cocoa mix? 2. Suppose the thermostat of your school s swimming pool malfunctions, causing the water temperature to climb to 34 ºC. The recommended temperature for competition is 25 ºC. If the pool holds 750,000 liters of water, how many liters must be drained from the pool and replaced with tap water (6 ºC) to make it ready for competition? 3. Some types of mixture problems involve combining solutions made up of different percentages of a substance in order to get a mixture with the desired percentage of that substance. The method is the same as that used in the activity you just completed. Solve the following mixture problem. Solution A is 5% acid. Solution B is 17% acid. A chemist wants to mix the two to get 500 ml of a solution that is 12% acid. How much of each should be used? Modified from and reproduced with permission of the publisher 2002 Texas Instruments Incorporated 7-5
Chill Out: How Hot Objects Cool
Chill Out: How Hot Objects Cool Activity 17 When you have a hot drink, you know that it gradually cools off. Newton s law of cooling provides us with a model for cooling. It states that the temperature
Specific Heat Capacity Lab
Specific Heat Capacity Lab Do Now: Look at the set-up picture below, make a prediction about what do you think will happen when the two containers of water is mixed. (Note: Assuming no heat lost to the
Use Newton s law of cooling to narrow down the number of suspects by determining when the victim was killed.
Case File 14 Hot Air, Cold Body: Using Newton s law of cooling to determine time of death Use Newton s law of cooling to narrow down the number of suspects by determining when the victim was killed. Memo
The Energy of Phase Changes
The Energy of Phase Changes Introduction Consider heating a solid: as the solid is warmed, energy from the source of heat is "put into" the solid, and the solid gains energy. If the heating is continued,
CHEMISTRY 135 General Chemistry II. Energy of Phase Changes [1]
![CHEMISTRY 135 General Chemistry II. Energy of Phase Changes [1]](/thumbs/83/88951011.jpg "CHEMISTRY 135 General Chemistry II. Energy of Phase Changes [1]")
CHEMISTRY 135 General Chemistry II Energy of Phase Changes [1] Water at its triple point, where 3 phases coexist, looks unfamiliar a bit like boiling water and ice. [2] Coexistence of two phases, such
DETERMINING AND USING H
DETERMINING AND USING H INTRODUCTION CHANGES IN CHEMISTRY Chemistry is the science that studies matter and the changes it undergoes. Changes are divided into two categories: physical and chemical. During
What Causes the Seasons?
Name Date What Causes the Seasons? Experiment 10 Because the axis of the earth is tilted, the earth receives different amounts of solar radiation at different times of the year. The amount of solar radiation
THE ENERGY OF PHASE CHANGES
C H E M I S T R Y 1 5 0 Chemistry for Engineers THE ENERGY OF PHASE CHANGES DEPARTMENT OF CHEMISTRY UNIVERSITY OF KANSAS The Energy of Phase Changes Introduction Consider heating a solid: as the solid
What Do You Think? Investigate GOALS. Part A: Freezing Water
Activity 5 Freezing Water GOALS In this activity you will: Determine the freezing point of water. Show graphically what happens to the temperature as water is cooled to freezing and while it is freezing.
Sweating Alcohol TEACHER NOTES SCIENCE NSPIRED. Science Objectives. Math Objectives. Materials Needed. Vocabulary.
Science Objectives Students will collect data for the cooling rates of water and isopropyl alcohol. Students will compare and contrast the cooling rate data, both graphically and numerically. Students
SPECIFIC HEAT CAPACITY AND HEAT OF FUSION
SPECIFIC HEAT CAPACITY AND HEAT OF FUSION Apparatus on each table: Thermometer, metal cube, complete calorimeter, outer calorimeter can (aluminum only), balance, 4 styrofoam cups, graduated container,
The Coffee-Turkey Juxtaposition
The Materials TI-Nspire CX CAS handheld Vernier EasyTemp Sensor Hot water source Coffee cups Freshly cooked turkey Introduction to the Investigation Have you ever noticed that when a hot liquid is placed
CHM201 General Chemistry and Laboratory I Laboratory 7 Thermochemistry and Hess s Law May 2, 2018
Purpose: CHM201 General Chemistry and Laboratory I Laboratory 7 Thermochemistry and Hess s Law May 2, 2018 In this laboratory, you will measure heat changes arising from chemical reactions. You will use
Investigation #2 TEMPERATURE VS. HEAT. Part I
Name: Investigation #2 Partner(s): TEMPERATURE VS. HEAT These investigations are designed to help you distinguish between two commonly confused concepts in introductory physics. These two concepts, temperature
Experimental Procedure Lab 402
Experimental Procedure Lab 402 Overview Measured volume of several solutions having known concentrations of reactants are mixed in a series of trials. The time required for a visible color change to appear
Standards 2.4 and 3.4. Background Standard 2.4 Conservation of Energy (Standard 6.5)
This experiment aims to explain the concepts of States of Matter, Heat, and Changes in Matter and is applicable to Standards 2.4 and 3.4. The successful student will be able to explain the three common
Conductimetric Titration and Gravimetric Determination of a Precipitate
Conductimetric Titration and Gravimetric Determination of a Precipitate LabQuest 16 In this experiment, you will monitor conductivity during the reaction between sulfuric acid, H 2 SO 4, and barium hydroxide,
Evaluation copy. The Molar Mass of a Volatile Liquid. computer OBJECTIVES MATERIALS
The Molar Mass of a Volatile Liquid Computer 3 One of the properties that helps characterize a substance is its molar mass. If the substance in question is a volatile liquid, a common method to determine
A STUDY OF REACTION RATES
CH095 A Study of Reaction Rates Page 1 A STUDY OF REACTION RATES Chemical reaction rates are affected by changes in concentration of the reactants and temperature. How concentration and temperature affect
EXPERIMENT 14 SPECIFIC HEAT OF WATER. q = m s T
EXPERIMENT 14 SPECIFIC HEAT OF WATER INTRODUCTION: Heat is a form of energy which can pass from an object of relatively high temperature to an object of relatively low temperature. One physical property
Murder in the First Degree
Introduction In a murder investigation, a forensic expert may be called in to determine the time of death. Such determinations may involve examining the contents of the victim s stomach or inspecting decomposing
SPECIFIC HEAT CAPACITY
SPECIFIC HEAT CAPACITY Apparatus: Thermometer, balance, two large double Styrofoam cups, lid, hooked metal cube, lifting tool, hot plate, boiling pot. Any material is capable of storing some heat or thermal
Acid-Base Titration. Sample
Acid-Base Titration Computer 7 A titration is a process used to determine the volume of a solution that is needed to react with a given amount of another substance. In this experiment, your goal is to
Conductimetric Titration and Gravimetric Determination of a Precipitate
Conductimetric Titration and Gravimetric Determination of a Precipitate Handheld 16 In this experiment, you will monitor conductivity during the reaction between sulfuric acid, H 2 SO 4, and barium hydroxide,
The Phase Change Lab: Freezing and Melting of Water
The Phase Change Lab: Freezing and Melting of Water Experiment 3 Freezing temperature is the temperature at which a substance turns from a liquid to a solid. Melting temperature is the temperature at which
Chapter 1, Lesson 3: The Ups and Downs of Thermometers
Chapter 1, Lesson 3: The Ups and Downs of Thermometers Key Concepts The way a thermometer works is an example of heating and cooling a liquid. When heated, the molecules of the liquid in the thermometer
CH 112 Special Assignment #4 Chemistry to Dye for: Part C
CH 112 Special Assignment #4 Chemistry to Dye for: Part C PRE-LAB ASSIGNMENT: Make sure that you read this handout and bring the essentials to lab with you. Review Light, energy and color (pp 17-18), Measuring
Name: Chemistry 103 Laboratory University of Massachusetts Boston HEATS OF REACTION PRELAB ASSIGNMENT
Name: Chemistry 103 Laboratory University of Massachusetts Boston HEATS OF REACTION PRELAB ASSIGNMENT Chemical and physical changes usually involve the absorption or liberation of heat, given the symbol
To use calorimetry results to calculate the specific heat of an unknown metal. To determine heat of reaction ( H) from calorimetry measurements.
Calorimetry PURPOSE To determine if a Styrofoam cup calorimeter provides adequate insulation for heat transfer measurements, to identify an unknown metal by means of its heat capacity and to determine
The Hand Warmer Design Challenge: Where Does the Heat Come From?
The Hand Warmer Design Challenge: Where Does the Heat Come From? LSNED Learn Something New Every Day About Sharing and Contributions Interesting Facts Science In Your Mittens: The Chemistry Of Hand Warmers
Activity 6. Exploring the Exponential Function. Objectives. Introduction
Objectives Activity 6 Exploring the Exponential Function Differentiate between exponential growth or decay from an equation Identify the coefficient in an equation that represents the rate of growth/decay
Determining the Enthalpy of a Chemical Reaction
Determining the Enthalpy of a Chemical Reaction Computer 13 All chemical reactions involve an exchange of heat energy; therefore, it is tempting to plan to follow a reaction by measuring the enthalpy change
Properties of Matter Lab What is the Matter? Three States of Matter 1. What are the three states of matter?
Name: Properties of Matter Lab What is the Matter? Three States of Matter 1. What are the three states of matter? 2. Which state of matters volume can easily be changed? Period: 3. Compare the densities
Latent Heat of Fusion
Activity 33 PS-2826 Latent Heat of Fusion Thermodynamics: phase change, latent heat of fusion, melting Qty Equipment and Materials Part Number 1 PASPORT Xplorer GLX PS-2002 1 Fast-Response Temperature
The Enthalpies of Reactions
The Enthalpies of Reactions Collect 2 Styrofoam cups & a cup lid Digital thermometer Stop watch (from TA) Prepare 400 ml beaker 50 ml graduated cylinder * Take the warm water heated in hood (2015/09/20
LESSON 6: Dew Drops ESTIMATED TIME Setup: 5 10 minutes Procedure: minutes
LESSON 6: Dew Drops ESTIMATED TIME Setup: 5 10 minutes Procedure: 15 20 minutes DESCRIPTION Use jars of hot and cold water to demonstrate how water changes states. OBJECTIVE This lesson demonstrates the
Conductometric Titration & Gravimetric Determination of a Precipitate
Conductometric Titration & Gravimetric Determination of a Precipitate Experiment 9 In this experiment, you will monitor conductivity during the reaction between sulfuric acid, H2SO4, and barium hydroxide,
MIXTURES, COMPOUNDS, & SOLUTIONS
MIXTURES, COMPOUNDS, & SOLUTIONS As with elements, few compounds are found pure in nature and usually found as mixtures with other compounds. A mixture is a combination of two or more substances that are
How Does Temperature Affect Daphnia Heart Rate? Student Study Guide
TM How Does Temperature Affect Daphnia Heart Rate? Student Study Guide The body temperature of the Arctic squirrel drops from 98.6 F to 26.4 F, which is below the freezing point of water and is the lowest
THE TEMPERATURE DEPENDENCE OF THE EQUILIBRIUM CONSTANT
Experiment 7B THE TEMPERATURE DEPENDENCE OF THE EQUILIBRIUM CONSTANT Prepared by Ross S. Nord, Chemistry Department, Eastern Michigan University PURPOSE To investigate the relationship between the equilibrium
Objectives. Materials TI-73 CBL 2 TM
. Objectives Activity 5 To understand that acids and bases are electrolytes. This is a physical property of matter To be able to measure the voltage produced by an electrolyte using the voltage sensor
Activity Title: It s Either Very Hot or Very Cold Up There!
Grades 3-5 Teacher Pages Activity Title: It s Either Very Hot or Very Cold Up There! Activity Objective(s): In this activity, and the follow-up activity next week, teams will design and conduct experiments
Lab 12 Pressure-Temperature Relationship in Gases
Lab 12 Pressure-Temperature Relationship in Gases INTRODUCTION /PURPOSE/PLE LAB QUESTION Gases are made up of molecules that are in constant motion and exert pressure when they collide with the walls of
kinetic molecular theory thermal energy.
Thermal Physics 1 Thermal Energy The kinetic molecular theory is based on the assumption that matter is made up of tiny particles that are always in motion. In a hot object the particles are moving faster
Determination of the Equivalent Weight and the K a or K b for a Weak Acid or Base
INTRODUCTION Determination of the Equivalent Weight and the K a or K b for a Weak Acid or Base Chemists frequently make use of the equivalent weight (eq. wt.) as the basis for volumetric calculations.
8.4 Changes in Matter: Hot Ice and the Carbon Snake. Grade 8 Activity Plan
8.4 Changes in Matter: Hot Ice and the Carbon Snake Grade 8 Activity Plan 1 Reviews and Updates - Hot Ice and Carbon Snake Activity add by Fola Akpan in July 2017 2 8.4 Changes in Matter: Hot Ice and the
Kinetics of Crystal Violet Bleaching
Kinetics of Crystal Violet Bleaching Authors: V. C. Dew and J. M. McCormick* From Update March 12, 2013 with revisions Nov. 29, 2016 Introduction Chemists are always interested in whether a chemical reaction
Calorimetry. A calorimeter is a device in which this energy transfer takes place
Calorimetry One technique for measuring specific heat involves heating a material, adding it to a sample of water, and recording the final temperature This technique is known as calorimetry A calorimeter
The Specific Heat of a Liquid
The Purpose: To experimentally determine the specific heat of ethyl alcohol. Principles: Heat is a form of energy which can pass spontaneously from an object at a higher temperature to an object at a lower
Lesson 4. Temperature change
Lesson 4 Temperature change T E A C H E R G U I D E Lesson summary Students meet scientist Jason Williams, an industrial chemist who designs the materials and processes for making solar cells. He explains
Ideal Gas and Latent Heat
Ideal Gas and Latent Heat Objectives: To understand the significance of the ideal gas law. To determine the value of absolute zero on the Centigrade scale. To design an experiment to measure the latent
2,000-gram mass of water compared to a 1,000-gram mass.
11.2 Heat To change the temperature, you usually need to add or subtract energy. For example, when it s cold outside, you turn up the heat in your house or apartment and the temperature goes up. You know
Energy Transformations Activities Students engage in different activities to observe energy changing form!
Energy Transformations Activities Students engage in different activities to observe energy changing form! Name: Energy Labs and Activities Activity 1: Static Electricity Glue this side down Procedure:
Chemical Equilibrium: Finding a Constant, Kc
Chemical Equilibrium: Finding a Constant, Kc Experiment 20 The purpose of this lab is to experimentally determine the equilibrium constant, K c, for the following chemical reaction: Fe 3+ (aq) + SCN (aq)
Mixtures and substances Investigating mixtures and substances
Year 7 Science Camp Booklet Activity Mixtures and substances Investigating mixtures and substances Science start up Unit 1: Lesson 4 Today you will: identify different mixtures including solutions. There
Lab Activity 3: Factors Affecting Reaction Rate
Chemistry 3202 Lab #3 factors affecting Reaction Rate Page 1 of 5 Lab Activity 3: Factors Affecting Reaction Rate Introduction Several factors influence how fast a reaction proceeds. In this activity,
AP PHYSICS 2 WHS-CH-14 Heat Show all your work, equations used, and box in your answers! 1 108kg
AP PHYSICS 2 WHS-CH-4 Heat Show all your work, equations used, and box in your answers! James Prescott Joule (88 889) James Prescott Joule studied the nature of heat, and discovered its relationship to
Unit 2. Phases of Matter and Density
Name Pd Unit 2 Phases of Matter and Density Name Pd Name Pd Homework for Unit 2 1. Vocab for Unit 2; due: 2. Pg 17 (1-5), pg 19 (1-5), pg21 (1-5) complete sentences; due: 3. Pg 23 (1-6), pg 27 (1-6) complete
NUMB3RS Activity: Clearing All Obstacles. Episode: Hot Shot
Page 1 NUMB3RS Activity: Clearing All Obstacles Topic: Parabolic Equations Grade Level: 10-1 Objective: Students will use the TI-Navigator TM system to explore changes of projectile motion due to initial
KINETICS II - THE IODINATION OF ACETONE Determining the Activation Energy for a Chemical Reaction
KINETICS II - THE IODINATION OF ACETONE Determining the Activation Energy for a Chemical Reaction The rate of a chemical reaction depends on several factors: the nature of the reaction, the concentrations
Lab: Phase Change. Introduction. Predict. Computer setup- Equipment setup- Name: Period: Date:
/16 Points Lab: Phase Change Introduction Every substance has a characteristic freezing point and melting point. As you might expect, the substance changes phase at each of these temperatures. A pure substance
Experiment 14 It s Snow Big Deal
Experiment 14 It s Snow Big Deal OUTCOMES After completing this experiment, the student should be able to: use computer-based data acquisition techniques to measure temperatures. draw appropriate conclusions
ALE 25. The First Law of Thermodynamics
q = +1674 J q = +3348 J q = -837 J Name Chem 161, Section: Group Number: ALE 25. The First Law of Thermodynamics (Reference: Chapter 6 - Silberberg 5 th edition) Important!! For answers that involve a
IODINE CLOCK REACTION KINETICS
Name: Section Chemistry 104 Laboratory University of Massachusetts Boston IODINE CLOCK REACTION KINETICS PRELAB ASSIGNMENT Calculate the initial concentration of H 2 O 2 that exists immediately after mixing
In fact, we are going to be sneaky and use Hess s Law to determine the heat of magnesium combustion indirectly. Go to the website:
Chemistry 161 Please prepare your notebook though the data tables before class on Wednesday, October 27. Write an abstract and place it at the front of your individual report. The abstract and the report
Endothermic and Exothermic Reactions
Endothermic and Exothermic Reactions Experiment 1 Many chemical reactions give off energy. Chemical reactions that release energy are called exothermic reactions. Some chemical reactions absorb energy
Measuring Momentum: Using distance moved after impact to estimate velocity
Case File 6 Measuring Momentum: Using distance moved after impact to estimate velocity Explore how the speed of an impacting vehicle causes a stationary object to move. Police Report Last Tuesday night,
Heat Lost and Heat Gained Determining the Specific Heat of a Metal
20 Determining the Specific Heat of a Metal This lab is divided into two parts. In the first part you will examine the relationship between heat lost and heat gained when two liquids are mixed. In the
Alka Seltzer Lab: Reaction rate - Factors that affect the rate of chemical reactions
Alka Seltzer Lab: Reaction rate - Factors that affect the rate of chemical reactions Materials Lead Scribe Reporter/Questioner Clean-up WRITE ALL NOTES / DATA / OBSERVATIONS ON YOUR DATA SHEET The rate
Density of an Unknown
Experiment 3 Density of an Unknown Pre-Lab Assignment Before coming to lab: Read the lab thoroughly. Answer the pre-lab questions that appear at the end of this lab exercise. Purpose The density of an
Lab 13.3 Determining K c via Colorimetry
BACKGROUND Most chemical reactions are reversible. They will proceed forward to a point where the products they have formed begin to collide with one another and reform the original reactants. When the
The Synthesis and Analysis of Aspirin
The Synthesis and Analysis of Aspirin Computer 22 Aspirin, the ubiquitous pain reliever, goes by the chemical name acetylsalicylic acid. One of the compounds used in the synthesis of aspirin is salicylic
MEASUREMENT: PART II
1 MEASUREMENT: PART II Copyright: Department of Chemistry, University of Idaho, Moscow, ID 83844-2343, 2013. INTRODUCTION Read and/or review Section 1.7 and Figure 7.5 in your textbook. The first part
THIS LAB IS CHAOS! 2. In liquids or gases? Explain.
THIS LAB IS CHAOS! PRELAB INTRODUCTION Part 1 We are already familiar with the Enthalpy (H) for a reaction. We know that if a reaction gives off heat, that it is considered exothermic and has a negative
Boiling Ice Lab. D) Materials A thermometer A beaker A stopwatch A hot plate Ice
IP 644 Name: Date: Block: Boiling Ice Lab A) Introduction All matter can exist as a solid, liquid, or gas. The phase in which a substance exists depends on its temperature. The solid phase exists at a
The Determination of an Equilibrium Constant
The Determination of an Equilibrium Constant Calculator 10 Chemical reactions occur to reach a state of equilibrium. The equilibrium state can be characterized by quantitatively defining its equilibrium
EXPERIMENT 9 ENTHALPY OF REACTION HESS S LAW
EXPERIMENT 9 ENTHALPY OF REACTION HESS S LAW INTRODUCTION Chemical changes are generally accompanied by energy changes; energy is absorbed or evolved, usually as heat. Breaking chemical bonds in reactants
C q T q C T. Heat is absorbed by the system H > 0 endothermic Heat is released by the system H < 0 exothermic
PLEASE REORD ALL DATA DIRETLY INTO YOUR LAB NOTEBOOKS Introduction Heating a substance is one of the simplest processes carried out in the chemical laboratory, and is usually accompanied by a rise in the
Conduction is the transfer of heat by the direct contact of particles of matter.
Matter and Energy Chapter 9 energy flows from a material at a higher temperature to a material at a lower temperature. This process is called heat transfer. How is heat transferred from material to material,
Preview. Heat Section 1. Section 1 Temperature and Thermal Equilibrium. Section 2 Defining Heat. Section 3 Changes in Temperature and Phase
Heat Section 1 Preview Section 1 Temperature and Thermal Equilibrium Section 2 Defining Heat Section 3 Changes in Temperature and Phase Heat Section 1 TEKS The student is expected to: 6E describe how the
PLEASE DO NOT WRITE ON THIS EXAM!!
Chemistry First Semester Exam 2015 Multiple Choice Identify the choice that best completes the statement or answers the question. Record the answer on both the clicker and this test. Use this graph to
LABORATORY INVESTIGATION
LABORATORY INVESTIGATION Diffusion Through a Dialysis Membrane Transport of substances into and out of the cell is necessary in order to sustain life. Substances transported into the cell are used for
Name Student Activity
Open the TI-Nspire document Treasure_Trove.tns. Imagine digging for buried treasure and finding thousands of. This amount of treasure might weigh much more than you could carry! In this activity, you will
Quest Chapter 21. More heat energy means more of what type of energy? Does the mass change? So, what must change? What is the same in both containers?
1 When a container of gas is heated, what happens to the average speed of its molecules? 1. Additional information is needed. 2. increases 3. doesn t change 4. decreases 2 (part 1 of 3) Two glasses of
SPECIFIC HEAT OF WATER LAB 11-2
CONCEPT Heat of Fusion Changes of state (phase changes) involve the conversion or transition of matter from one of the common states (solid, liquid or gas) to another. Examples include fusion or melting
EXPERIMENT 6: ABSOLUTE ZERO
LAB SECTION: NAME: EXPERIMENT 6: ABSOLUTE ZERO Introduction: In this lab, you will use the relationship between temperature and volume for a gaseous substance (we will use air) to determine the temperature
Thermochemistry. Introduction. Pre-lab. Safety
Introduction Thermochemistry All chemical reactions and phase changes involve energy. One form of energy is heat: when a change in the energy of a system results in a temperature difference, we say that
Eton College King s Scholarship Examination 2012
Eton College King s Scholarship Examination 2012 SCIENCE (SECTION 1) (60 minutes) Candidate Number: INSTRUCTIONS Write your candidate number, not your name, in the space provided above. You should attempt
Lecture 23. Specific Heat and Phase Changes
Lecture 23 Specific Heat and Phase Changes Today s Topics: Heat and Temperature Change Specific heat Heat and Phase Change Latent heat Heat and Temperature Change Heat is energy that flows from a higher-temperature
Experiment 7 Can You Slow It Down?
Experiment 7 Can You Slow It Down? OUTCOMES After completing this experiment, the student should be able to: tell which factors influence the reaction rate and how they influence the rate. change the temperature
Temperature and Heat. Two systems of temperature. Temperature conversions. PHY heat - J. Hedberg
Temperature and Heat 1. Two systems of temperature 1. Temperature conversions 2. Real science (one scale to rule them all) 3. Temperature scales 2. Effects of temperature on materials 1. Linear Thermal
Lab #3 ph and Buffers
Page1 Lab #3 ph and Objectives: Learn to construct a proper data table and line graph Understand how the ph scale works Use a ph meter to measure the ph of common household substances Understand the meaning
Chapter 3 Metric Units and Conversions
Chapter 3 Metric Units and Conversions 3.1 The Metric System and Prefixes Metric system: a simple decimal system of measurement that uses the following basic units: Quantity Basic Unit Symbol length meter
Name Class Date. What are three kinds of energy transfer? What are conductors and insulators? What makes something a good conductor of heat?
CHAPTER 14 SECTION Heat and Temperature 2 Energy Transfer KEY IDEAS As you read this section, keep these questions in mind: What are three kinds of energy transfer? What are conductors and insulators?
KEY. Chemistry Baseline Cornerstone Assessment: Part A. Experimental Design. Directions: Read the paragraph below and then respond to the questions.
Chemistry Baseline Cornerstone Assessment: Part A. Experimental Design Directions: Read the paragraph below and then respond to the questions. Hydrogen peroxide is a liquid that breaks down and releases
Connecticut Common Core Algebra 1 Curriculum. Professional Development Materials. Unit 8 Quadratic Functions
Connecticut Common Core Algebra 1 Curriculum Professional Development Materials Unit 8 Quadratic Functions Contents Activity 8.1.3 Rolling Ball CBR Activity 8.1.7 Galileo in Dubai Activity 8.2.3 Exploring
Data Sheet for Task 1: Mixing It Up!
Data Sheet for Task 1: Mixing It Up! 1. Mix 25 ml water and 1 ml of Mystery Material A in a small container. Then mix 25 ml water and 1 ml of Mystery Material B in another container. Put the lids on and
EVAPORATION AND INTERMOLECULAR ATTRACTIONS From Chemistry with Vernier, Vernier Software and Technology LABQUEST 9
EVAPORATION AND INTERMOLECULAR ATTRACTIONS From Chemistry with Vernier, Vernier Software and Technology LABQUEST 9 Westminster College In this experiment, Temperature Probes are placed in various liquids.
Hess' Law: Calorimetry
Exercise 9 Page 1 Illinois Central College CHEMISTRY 130 Name: Hess' Law: Calorimetry Objectives The objectives of this experiment are to... - measure the heats of reaction for two chemical reactions.
Synthesis of Benzoic Acid
E x p e r i m e n t 5 Synthesis of Benzoic Acid Objectives To use the Grignard reagent in a water free environment. To react the Grignard reagent with dry ice, CO 2(s). To assess the purity of the product