Chapter 4
Review Exercises
PSC1515
1. Identify each of the following as atoms or molecules and as elements or
compounds:
a. Iron (Fe)
__________ _____________
b. carbon dioxide (CO2)
__________ _____________
c. nitrogen (N2)
__________ _____________
2. What movement exist for particles in each of the following states of
matter?
a. solid _______________________________
b. liquid_______________________________
c. gas________________________________
3. What is the relationship between heat, temperature, kinetic energy and
speed of movement of particles in a substance?
As more heat is applied to a substance, the temperature
______________, the kinetic energy_____________and the
speed_________________.
4. Convert the following:
a. 45oC to oF
b. -67oF to oC
c. -210oC to K
5. The freezing point of water is _________oC, ____________oF or
____________K.
6. The boiling point of water is _________oC, ____________oF or
____________K.
7. The magnitude of 1oC is equal to ______K and _______oF.
8. Absolute zero is _______K.
9. Identify each of the following as heating or cooling:
a. Internal energy decreases______________
b. Internal energy increases_______________
10. 1 cal=_______J
1 kcal = ________ cal
11. The specific heat of substance A is .657 cal/goC. If 27 kcal of heat are
applied to equal masses of water and of substance A, which of the two
substances will increase more in temperature?____________
12. What is the specific heat of a substance in J/goC if 6.9 grams of it increase
in temperature by 12.2oC after the application of 43.7 J?
13. How much heat is required in calories to increase the temperature of 578
grams of water from 20oC to 87oC?
14. Identify the following changes in physical state:
a. sugar becoming syrup____________________
b. dry ice converting to carbon dioxide gas___________________
c. water vapor transforming to dew___________________
d. rain becoming snow____________________
e. a puddle of water disappearing after the sun shines on
it________________________
15. Another term for melting is _____________. Vaporization can be
_________________ (below the bp)
or ___________________(at the boiling point).
16. Match the law of thermodynamics with the description: First, second or
third law
The entropy of the universe is always increasing. _________
The work done on a system is equal to the internal energy of the system plus
the work done by the system.__________
Energy can neither be created nor destroyed, only converted from one form to
another.__________
All movement stops at absolute zero.___________
17. In the diagram below what do each of the letters represent?
D
T
E
M
P
E
B
C
A
Heat
1. a. atom, element b. molecule, compound c. molecule, compound
2. a. vibration b. vibration and rotation c. vibration, rotation and translation
3. increases, increases, increases
4. a. 113oF b. -55oF c. 63K
5. 0oC, 32oF, 273K
6. 100oC, 212oF, 373K
7. 1K and 1.8oF
8. 0K
9. a. cooling b. heating
10. 4.184, 1000
11. Substance A
12. .519 J/goC
13. 38,726 cal
14. a. melting b. subliming c. condensing d. freezing e. evaporating
15. fusion, evaporation, boiling
16. a. second b. first c. first d. third
17. A) solid heats B) melting C) liquid heats D) vaporization E) vapor heats
A____________
B____________
C____________
D____________
E____________
A