Chemistry 1. Worksheet 4. Temperature in Chemistry. 1 MathTutorDVD.com
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1 Chemistry 1 Worksheet 4 Temperature in Chemistry 1
2 Conversion factors: Celsius to Kelvin: Add Kelvin to Celsius: Subtract Celsius to Fahrenheit: T(F) = (T(C) x 1.8) + 32 Fahrenheit to Celsius: T(C) = (T(F) 32) x 5 /9 1. What do each of the following symbols stand for? a. K b. o C c. o F 2. Convert the following temperatures to Fahrenheit. a. 54 o C b. 25 o C c. 32 o C d. -35 o C 2
3 3. Convert the following temperatures to Celsius. a. 4 o F b. 51 o F c o F d. 33 o F 4. Convert the following temperatures to Kelvin. a. 54 o C b. 25 o C c. 32 o C d. -35 o C 3
4 5. Convert the following temperatures to Celsius. a. 543 K b. 273 K c K d. 0 K 6. Convert the following temperatures to Fahrenheit. a. 450K b. 5K 4
5 7. Convert the following temperatures to Kelvin. a. 2 o F b. -22 o F 8. Which is the lowest temperature: 5 o F, 22 o C, or 183 K? 5
6 9. Circle the following option that is not a valid value for temperature. a. 4.0 X 10 5 o F b. -35 K c. -75 o C d. 750 K e. 20 o F 10. The freezing point of water is 32 o F and 0 o C. What is the freezing point of water in Kelvin? 11. Is water a solid, liquid or a gas at 245 K? 6
7 Answer Key Conversion factors: Celsius to Kelvin: Add Kelvin to Celsius: Subtract Celsius to Fahrenheit: T(F) = (T(C) x 1.8) + 32 Fahrenheit to Celsius: T(C) = (T(F) 32) x 5 /9 1. What do each of the following symbols stand for? a. K Kelvin b. o C degrees Celsius c. o F degrees Fahrenheit 2. Convert the following temperatures to Fahrenheit. a. 54 o C b. 25 o C T(F) = (T(C) x 1.8) + 32 T(F) = (54 o C x 1.8) + 32 T(F) = (97.2) + 32 T(F) = 77 o F T(F) = o F c. 32 o C d. -35 o C T(F) = 89.6 o F T(F) = -31 o F 7
8 3. Convert the following temperatures to Celsius. a. 4 o F b. 51 o F T(C) = (T(F) 32) x 5 /9 T(C) = (4 o F 32) x 5 /9 T(C) = (-28) x 5 /9 T(C) = 10.6 o C T(C) = o C c o F d. 33 o F T(C) = o C T(C) = 0.56 o C 4. Convert the following temperatures to Kelvin. a. 54 o C b. 25 o C 54 o C = K 25 o C = K c. 32 o C d o C 54 o C = K - 35 o C = K 8
9 5. Convert the following temperatures to Celsius. a. 543 K b. 273 K 543 K = o C 273 K = o C c K d. 0 K 2789 K = o C 0 K = o C 6. Convert the following temperatures to Fahrenheit. a. 450 K First, we need to convert to Celsius. 450 K = _ o C_ T(F) = (T(C) x 1.8) + 32 T(F) = ( o C x 1.8) + 32 T(F) = Correct answer: T(F) = o F b. 5 K 5 K = _ o C_ T(F) = (T(C) x 1.8) + 32 T(F) = ( o C x 1.8) + 32 T(F) = Correct answer: T(F) = o F 9
10 7. Convert the following temperatures to Kelvin. a. 2 o F We must first convert Fahrenheit to Celsius. T(C) = (T(F) 32) x 5 /9 T(C) = (2 o F 32) x 5 /9 T(C) = (-30) x 5 /9 T(C) = o C K = Correct answer: K = K b. -22 o F T(C) = (-22 o F 32) x 5 /9 T(C) = (-54) x 5 /9 T(C) = -30 o C K = Correct answer: K = K 8. Which is the lowest temperature: 5 o F, 22 o C, or 183 K? In order to solve this, we need to convert all values to a common scale. Celsius will require the least amount of work. T(C) = (T(F) 32) x 5 /9 5 o F = -15 o C 183 K = o C Correct answer: 183 K ( o C) is the lowest temperature. 10
11 9. Circle the following option that is not a valid value for temperature. Kelvin is what is known as an absolute temperature scale. This means that its possible values begin at 0 K, the temperature at which all molecular motion ceases. Because of this, it is not possible to have a value lower than 0 on this scale. Correct answer: b. -35 K 10. The freezing point of water is 32 o F and 0 o C. What is the freezing point of water in Kelvin? Here, we can simply convert degrees Celsius to Kelvin by adding o C = K. To confirm that the answer is the same if we convert from Fahrenheit: T(C) = (T(F) 32) x 5 /9 T(C) = (32 o F) 32) x 5 /9 T(C) = (0) x 5 /9 T(C) = 0 o C 0 o C = K Correct answer: K 11
12 11. Is water a solid, liquid or a gas at 245 K? Recall from the video that water freezes at 0 o C (a solid) and boils at 100 o C (a gas) and is a liquid at all temperatures in between. To solve this problem, we will need to convert 245 K to Celsius. 245 K = o C Correct answer: Since this value is less than 0 o C, water is a solid at 245 K. 12
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