Physical Science 20 - Heat Review
Use a separate sheet of paper for most answers.
1. Explain the differences between heat and temperature.
2. What are the postulates of the kinetic molecular theory?
3. Using the kinetic molecular theory, explain which state of matter has the largest amount of kinetic
energy?
4. Using the kinetic molecular theory, explain state of matter has the largest amount of potential energy?
5. What is thermal energy?
6. What are the 4 laws of Thermodynamics?
7. What are the 3 different types of heat transfer? How can they be applied in your daily life?
8. Why is water special in terms of thermal expansion?
9. Complete the following conversions
a. 27 °C
c. -35 °C
b. 196K
d. 312K
10. If a 89.0 cm pipe of aluminum is heated from 45 °C to 150 °C, will it expand or contract, and by how
much?
11. A 3.00-liter aluminum cylinder at 5.00°C is filled to the brim with unused engine oil at the same
temperature. If the aluminum (βAl = 6.90 x 10-5/˚C) and unused engine oil (βoil = 7.00 x 10-4/˚C) are
warmed to 58.0°C, how much oil spills out?
12. A 25 g piece of silver is heated from 20.0°C to 100°C. What amount of heat energy is absorbed?
13. How much water at 4.0°C must be added to 200 g of water at 60.0°C to give a final temperature of
36.0°C?
14. How much copper at 4.0°C must be added to 200 g of water at 60.0°C to give a final temperature of
36.0°C?
15. How much heat must be added to 1.00 kg of lead at -5.0°C in order to vaporize it with a final
temperature of 2000.0°C? (The specific heat capacity of lead in the liquid state is 167 J/kg∙°C, and the
specific heat capacity of lead in the gas state is 120 J/kg∙°C. The other information can be found on
your charts.)
16. Find the heat of reaction (ΔH) for each of the following unbalanced chemical reactions and note
whether each reaction is exothermic or endothermic:
a. H2O(l)  H2O(g)
b. SO2 (g) + O2 (g)  SO3 (g)
c. C3H8 (g) + O2 (g)  CO2 (g) + H2O(g)
d. C2H6(g) + O2(g)  CO2(g) + H2O(l)
Answers: 9.a) 300K b) -77°C c) 238K d) 39°C; 10. 2.07mm; 11. 0.100L; 12. 460J; 13. 0.15kg; 14. 1.6kg; 15. 1.21MJ;
16.a) 43.8kJ (ENDOTHEMIC) b) -197.8kJ (EXOTHERMIC) c) -2043.8kJ (EXOTHERMIC) d) -3121.2kJ (EXOTHERMIC)