Study Tips. Thermodynamics

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Noah Curtis
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1 FINAL EXAM REVIEW Mon., Dec 10, 2007 (2:50-5:40 pm) Bring a calculator! Any kind will be allowed! Crib Sheets 4 pages max, 8.5 x11 Student s own handwritten notes on 1 side only Neatly print name on back of crib sheets 48 Multiple Choice Questions Get rest prior to exam Arrive on time Study Tips Study all past exams Take Eduspace practice exams Take past exams on WebCT Study problems at end of chapters Work in small study groups to drill each other Do not wait until the last minute to cram! Kinetics The reaction 2A + B C is studied by monitoring [A]. ver the first 3.2 min, [A] decreases from 6.68 x 10-2 M to 6.23 x 10-2 M. What is the avg rxn rate over this time period x 10-3 mol L -1 s x 10-3 mol L -1 s x 10-5 mol L -1 s x 10-5 mol L -1 s -1 Week 15 CHEM Sections L and M 1 Week 15 CHEM Sections L and M 2 Week 15 CHEM Sections L and M 3 Kinetics The reaction 2A + B C is studied by monitoring [A]. ver the first 3.2 min, [A] decreases from 6.68 x 10-2 M to 6.23 x 10-2 M. What is the avg rxn rate over this time period x 10-3 mol L -1 s x 10-3 mol L -1 s x 10-5 mol L -1 s x 10-5 mol L -1 s -1 Entropy is the thermodynamic property which constitutes a quantitative measure of the. 1. heat content of a system. 2. degree of disorder of a system. 3. internal energy of system. 4. total energy of the universe Entropy is the thermodynamic property which constitutes a quantitative measure of the. 1. heat content of a system. 2. degree of disorder of a system. 3. internal energy of system. 4. total energy of the universe Week 15 CHEM Sections L and M 4 Week 15 CHEM Sections L and M 5 Week 15 CHEM Sections L and M 6 Boiling Point Trends Which element has the lowest bp 1) Xe 2) Kr 3) Ne 4) Ar Boiling Point Trends Which element has the lowest bp 1) Xe 2) Kr 3) Ne 4) Ar For a given substance, the most disordered physical state is: 1. gas 2. liquid 3. solid 4. californium Week 15 CHEM Sections L and M 7 Week 15 CHEM Sections L and M 8 Week 15 CHEM Sections L and M 9 1

2 For a given substance, the most disordered physical state is: 1. gas 2. liquid 3. solid 4. californium Which of the following processes involves an increase in the entropy of the system (1) Melting of a solid (2) Sublimation (3) Evaporation of a liquid (4) All of the above (5) None of the above Which of the following processes involves an increase in the entropy of the system (1) Melting of a solid (2) Sublimation (3) Evaporation of a liquid (4) All of the above (5) None of the above Week 15 CHEM Sections L and M 10 Week 15 CHEM Sections L and M 11 Week 15 CHEM Sections L and M 12 Acids & Bases Which of the following is NT an acid 1) HCl 2) NaH 3) H 2 S 4 4) HN 3 Acids & Bases Which of the following is NT an acid 1) HCl 2) NaH 3) H 2 S 4 4) HN 3 Ionic Nomenclature What is the name of the ionic species S 4 2-1) Sulfur oxide anion 2) Sulfite 3) Sulfurous anion 4) Sulfate Week 15 CHEM Sections L and M 13 Week 15 CHEM Sections L and M 14 Week 15 CHEM Sections L and M 15 Ionic Nomenclature What is the name of the ionic species S 4 2-1) Sulfur oxide anion 2) Sulfite 3) Sulfurous anion 4) Sulfate Atoms and Electrons How many electrons are present in 31 P + 1) 31 2) 30 3) 14 4) 15 Atoms and Electrons How many electrons are present in 31 P + 1) 31 2) 30 3) 14 4) 15 Week 15 CHEM Sections L and M 16 Week 15 CHEM Sections L and M 17 Week 15 CHEM Sections L and M 18 2

3 Moles How many moles are present in 500 mg of Tylenol (C 8 H 9 N 2 ) 1) 3.3 mmol 2) 7.5 mmol 3) 3308 mmol 4) 3496 mmol Moles How many moles are present in 500 mg of Tylenol (C 8 H 9 N 2 ) 1) 3.3 mmol 2) 7.5 mmol 3) 3308 mmol 4) 3496 mmol Balancing Chemical Eqns Balance the following equation C 4 H > C 2 + H 2 What is the coefficient for 2 1) 3 2) 4 3) 5 4) 6 Week 15 CHEM Sections L and M 19 Week 15 CHEM Sections L and M 20 Week 15 CHEM Sections L and M 21 Balancing Chemical Eqns Balance the following equation C 4 H > C 2 + H 2 What is the coefficient for 2 1) 3 2) 4 3) 5 4) 6 Dilutions What volume of M HCl is needed to make L of a M solution 1) L 2) L 3) L 4) L Dilutions What volume of M HCl is needed to make L of a M solution 1) L 2) L 3) L 4) L Week 15 CHEM Sections L and M 22 Week 15 CHEM Sections L and M 23 Week 15 CHEM Sections L and M 24 Periodic Table In which of the following atoms is the number of valence electrons equal to 6 1) P 2) Se 3) Sb 4) all Periodic Table In which of the following atoms is the number of valence electrons equal to 6 1) P 2) Se 3) Sb 4) all Formulas Which of the following formulas would be expected in a compound containing aluminum and oxygen 1) Al 2 3 2) Al 3 2 3) Al 2 4) Al 2 Week 15 CHEM Sections L and M 25 Week 15 CHEM Sections L and M 26 Week 15 CHEM Sections L and M 27 3

4 Formulas Which of the following formulas would be expected in a compound containing aluminum and oxygen 1) Al 2 3 2) Al 3 2 3) Al 2 4) Al 2 Ideal Gas Relationships At STP, the mass of 90 L of a certain gas is 8 g. What is the possible identity of the gas a) H 2 b) Corrected this question 2 c) N 2 d) Ar Ideal Gas Relationships At STP, the mass of 90 L of a certain gas is 8 g. What is the possible identity of the gas a) H 2 b) 2 c) N 2 d) Ar Week 15 CHEM Sections L and M 28 Week 15 CHEM Sections L and M 29 Week 15 CHEM Sections L and M 30 xidation # The oxidation number of manganese in KMn 4 is a) -1 b) +3 c) +5 d) +7 xidation # The oxidation number of manganese in KMn 4 is a) -1 b) +3 c) +5 d) +7 Week 15 CHEM Sections L and M 31 Week 15 CHEM Sections L and M 32 Week 15 CHEM Sections L and M 33 ph A ph value that is greater than 7 represents what type of chemical a) Acid b) Base c) Neutral d) Ionic ph A ph value that is greater than 7 represents what type of chemical a) Acid b) Base c) Neutral d) Ionic Phase Transitions The transition from a gas to a liquid is called a) Melting b) Freezing c) Condensation d) Sublimation Week 15 CHEM Sections L and M 34 Week 15 CHEM Sections L and M 35 Week 15 CHEM Sections L and M 36 4

5 Phase Transitions The transition from a gas to a liquid is called a) Melting b) Freezing c) Condensation d) Sublimation Final Exam Reminders Please arrive on time Bring a calculator and #2 pencil Crib Sheets: x11 sheets are allowed Student s own handwritten notes on one side only Print name on Crib sheets Submit ScanTron Sheet, exam, Crib sheets according to section. Week 15 CHEM Sections L and M 37 Week 15 CHEM Sections L and M 38 5

Questions 1 to 58 must be answered on the Scantron sheets.

Questions 1 to 58 must be answered on the Scantron sheets. Base your answers to questions 1 to 5 on the heating curve for a pure substance that is shown below. 1. The freezing point of the substance is