# Hey Jude

Topics: Ideal gas law, Gas, Ideal gas Pages: 6 (519 words) Published: January 19, 2013
05_CTR_ch14 7/12/04 8:13 AM Page 351

Name ___________________________

14.3

Date ___________________

Class __________________

IDEAL GASES

Section Review
Objectives
• Compute the value of an unknown using the ideal gas law
• Compare and contrast real and ideal gases

Vocabulary
• ideal gas constant (R)
• ideal gas law

Key Equation
• Ideal gas law: P

V

n

R

T or PV

nRT

Part A Completion

Use this completion exercise to check your understanding of the concepts and terms that are introduced in this section. Each blank can be completed with a term, short phrase, or number.
1

The ideal gas law permits you to solve for the

of a

1.

contained gas when the pressure, volume, and temperature are

2.

known. The ideal gas law is described by the formula
3

where the variable

2

3.

represents the number of moles of

gas and the letter R is the

4

. R is equal to

5

.

5.

A gas that conforms to the gas laws at all conditions of
temperature and pressure is an

6

7

6.

gas

7.

behaves ideally at all temperatures and pressures. Deviations

8.

from ideal behavior at high pressures can be explained by the

9.

intermolecular
9

8

gas. No

4.

between particles in a gas and the actual

of the particles.

Chapter 14 The Behavior of Gases

351

05_CTR_ch14 7/12/04 8:13 AM Page 352

Name ___________________________

Date ___________________

Class __________________

Part B True-False
Classify each of these statements as always true, AT; sometimes true, ST; or never true, NT. ________ 10. The ideal gas law allows you to solve for the number of moles of a contained gas when pressure, volume, and temperature are known. ________ 11. The ratio (P

V)/(R

T ) is equal to 1 for real gases.

________ 12. The behavior of a gas is most likely to approach ideal behavior at a high pressure and a low temperature.
________ 13. For an ideal gas, pressure and volume are directly proportional to each other when all other factors remain constant.
________ 14. The number of moles of gas is directly proportional to the number of particles.

Part C Matching
Match each description in Column B to the correct term in Column A.

Column A

Column B
LpkPa
Kpmol

a. 8.31

________ 16. real gas

b. a gas that follows the gas laws at all conditions of
pressure and temperature

________ 17. ideal gas

c. a gas that can be liquefied by applying pressure

________ 18. ideal gas constant (R)

d. PV

nRT

Part D Questions and Problems
Answer the following in the space provided.
19. Calculate the number of moles of oxygen in a 12.5-L tank if the pressure is 25,325 kPa and the temperature is 22 C.

20. Calculate the mass of nitrogen dioxide present in a 275-mL container if the pressure is 240.0 kPa and the temperature is 28 C.

352

Core Teaching Resources

________ 15. ideal gas law