Gas Laws

1.

1 point

Which of the following is constant for 1 mole of any ideal gas?

PVT

VT/P

PT/V

PV/T

2.

1 point

Which of these changes would NOT cause an increase in the pressure of a contained gas?

the volume of the container is increased

the average kinetic energy of the gas is increased

the temperature is increased

more of the gas is added to the container

3.

1 point

Which of the following is a valid pair representing STP?

1 atmosphere and 760 K

760 torr and 273 °C

760 mm Hg and 0 K

273 K and 760 torr

4.

1 point

A gas has a volume of 590 mL at a temperature of -55.0 C. What volume will the gas occupy at 30.0 C?

320 mL

420 mL

820 mL

260 mL

5.

1 point

Which of the following gases is the best choice for inflating a balloon that must remain inflated for a long period of time?

hydrogen

oxygen

argon

neon

6.

1 point

An air filled balloon has a volume of 225 L at 0.941 atm and 25 C. Soon after, the pressure changes to 0.99 atm and the temperature changes to 0 C. What is the new volume of the balloon?

215 L

209 L

196 L

348 L

7.

1 point

Organize the following gases in order of their rates of difusion, from slowest to fastest:

◦oxygen, O2

◦ammonia, NH3

◦hydrogen, H2

◦carbon dioxide, CO2

carbon dioxide, oxygen, ammonia, hydrogen

oxygen, hydrogen, carbon dioxide, ammonia

hydrogen, oxygen, ammonia, carbon dioxide

hydrogen, ammonia, oxygen, carbon dioxide

8.

1 point

A container filled with helium gas has a pressure of 127.5 kPa at a temperature of 290.K. What is the temperature when the pressure is 3.51 kPa?

15.5 K

148 K

10500 K

7.98 K

9.

1 point

Helium gas is collected over water at 25 C. What is the partial pressure of the helium gas, given the total pressure is 750.0 mmHg? The partial pressure of water at 25 C is 23.8 mmHg.

726.2 mmHg

23.8 mmHg

773.8 mmHg

25 mmHg

10.

1 point

The safefty limit for a certain can of aerosol spray is 95C. If the pressure of the gas in the can is 2.96 atm when it is 17 C, what will the pressure be at the safety limit?

3.76 atm

5.69 atm

16.5 atm

2.33 atm

11.

1 point

A mixture of gases at a total pressure of 95 kPa contains N2, CO2 and O2 gases. The partial pressure of the CO2 is 24 kPa and the partial pressure of the N2 is 48 kPa. What is the partial pressure of the O2?

23 Kpa

48 kPa

167 kPa

24 kPa

12.

1 point

A gas has a volume of 450. mL at 30.5 psi. What volume would the gas occupy if the pressure was changed to 1.0 atm?

13700 mL

548 mL

934 mL

217 mL

13.

1 point

Standard pressure is equal to:

760 atmospheres and 273 kPa

760 torr and 1 atm

1 torr and 760 atm

0 atmosphere and 760 torr

14.

1 point

What is the pressure (in atm) exerted by 32 g of O2 in a 22.0 L container at 30.0 C?

2.2 atm

1.1 atm

0.95 atm

1.6 atm

15.

1 point

"Absolute zero" is equal to:

0 K and -273 °C

273 K and 0 °F

273 °F and 0 °C

0 °C and -273 K

16.

1 point

A Kelvin temperature that is equivalent to 500 °C is:

227 k

773 k

1260 K

-227 k

17.

1 point

Under what conditions of temperature and pressure is the behavior of real gases most like that of ideal gases?

low temp and low press

high temp and low press

high temp and high press

low temp and high press

18.

1 point

Which of the following represent an equality that is TRUE?

1 atm = 760 torr

101.3 kPa = 1 torr

273 torr = 101.3 kPa

101.3 atm = 760 kPa

19.

1 point

At constant pressure and 25 °C a sample of gas occupies 4.5 liters. At what temperature will the gas occupy 9.0 liters?

596 K

50 C

596 C

50 K

20.

1 point

Calculate how much faster fluorine gas, F2, will effuse than chlorine gas, Cl2.

1.6 x faster

0.73 x faster

1.4 X faster

1.9 x faster