Ch 11

Gases are a collection of particles in constant, unpredictable motion. True False

False

Pressure is calculated by: P = Area/Force True False

False

The main component of the air we breathe is oxygen gas. True False

False

The vapor pressure of water is independent of temperature. True False

False

The volume of a gas and the number of particles is inversely proportional. True False

False

As you increase temperature, you increase the average energy of the gas particles. True False

True

Gases fill the entire volume of their container. True False

True

Pressure depends on how many gas particles are in a container. True False

True

There is a large distance between gas particles as compared to their relative size. True False

True

1 atm is equal to: 760 torr. 760 mm Hg. 14.7 psi. 101,325 Pa. all of the above

all of the above

What is the major component of the air we breathe? nitrogen carbon dioxide argon oxygen smog

nitrogen

What is the initial temperature (°C) of a system that has the pressure decreased by 10 times while the volume increased by 5 times with a final temperature of ? 75 300 -198 27 none of the above

27

A 5.00 liter balloon of gas at 25°C is cooled to 0°C. What is the new volume (liters) of the balloon? 5.46 liters 22.4 liters 4.58 liters 0 liters none of the above

4.58 liters

A sample of 0.255 mole of gas has a volume of 748 mL at 28°C. Calculate the pressure of this gas. (R= 0.0821 L ∙ atm / mol ∙ K) 7.84 × 10-4 atm 0.784 atm 8.42 atm 0.00842 atm none of the above

8.42 atm

A 5.00 liter balloon of gas at 25°C is cooled to 0°C. What is the new volume (liters) of the balloon? 5.46 liters 22.4 liters 4.58 liters 0 liters none of the above

4.58 liters

What is the equivalent pressure of 1520 torr in units of atm? 2.00 203,000 380. 1520 none of the above

2.00

What is the initial temperature of a gas if the volume changed from 1.00 L to 1.10 L and the final temperature was determined to be 255.0°C? 480°C 207°C -41°C 232°C none of the above

207°C

A balloon originally had a volume of 0.439 L at 44°C and a pressure of 729 torr. To what temperature must the balloon be cooled to reduce its volume to 378 mL if the pressure remained constant? 273°C 0°C 38°C 95°C none of the above

0 c

What is the equivalent pressure of 968 mm Hg in units of atm? 1.30 atm 968 atm 1.27 atm 0.785 atm none of the above

1.27 atm