Chapter 10 Homework


Homework 10.1: Kinetic Molecular Theory of Matter

1. Use the kinetic molecular theory to explain each of the following properties of gases:
a) expansion;
b) fluidity;
c) low density;
d) compressibility;
e) diffusion.
2. Describe the conditions under which a real gas is most likely to behave ideally.
3. State the two factors that van der Waals proposed to explain why real gases deviate from ideal behavior.
4. Which of the following gases would you expect to deviate significantly from ideal behavior:
a) He;
b) O2;
c) H2;
d) H2O;
e) N2;
f) HCl
g) NH3
5. What idea is the kinetic molecular theory based on?
6. State the five basic assumptions of the kinetic molecular theory.
7. How do gases compare with liquids and solids in terms of the distance between their molecules?
8. What is an elastic collision?
9. a) Write the equation that relates the average kinetic energy and speed of gas particles and indicate what each term represents.
b) What is the relationship between the temperature, speed and kinetic energy of gas molecules?
10. a) What is diffusion?
b) What factors affect the rate of diffusion of one gas through another?
c) What is the relationship between the mass of a gas particle and the rate at which it diffuses through another gas?
d) What is effusion?

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Homework 10.2: Pressure

1. Define pressure.
2. What units are used to express pressure measurements?
3. what are standard conditions for gas measurements?
4. Convert the following pressures to pressures in standard atmospheres:
a) 151.98 kPa
b) 456 torr
c) 912 mm Hg
5. a) Why does gas in a closed container exert pressure?
b) What is the relationship between the area a force is applied to and the resulting pressure?
6. a) What is atmospheric pressure?
b) Why does the atmosphere exert pressure?
7. a) Why does a column of mercury in a tube that is inverted in a dish of mercury have a height of about 760 mm at sea level?
b) What height would be maintained by a column of water inverted in a dish of water at sea level?
c) What accounts for the difference in the heights of the mercury and water columns?
8. a) Identify three units used to express pressure.
b) Convert one atmosphere to torr using cancellation of units.
c) What is a pascal?
9. Convert each of the following into a pressure reading expressed in torr:
a) 1.25 atm;
b) 2.48 x 10-3 atm;
c) 4.75 x 104 atm;
d) 7.60 x 106
10. Convert each of the following into the unit specified:
a) 125 mm Hg into atm;
b) 3.20 atm into Pa;
c) 5.38 kPa into torr.

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Homework 10.3: The Gas Laws: Boyle’s Law

Homework 10.4: The Gas Laws: Charles’ Law

Homework 10.5: The Gas Laws: Gay-Lussac’s Law

Homework 10.6: The Gas Laws: Combined Gas Law;

Homework 10.7: The Gas Laws: Dalton’s Law of Partial Pressure

modified by F.J. DeHoratius 2/12/2004