Why would the pressure in a container of gas rise 2.56 kPa? (Temperature remains the same)
The volume of the container increased.
The container leaks
This can't happen
The volume of the container decreased
The pressure inside a container increases when
the number of gas molecules decreases
when the volume increases and temperature decreases
the number of gas molecules increases
the temperature is decreased
A gas has a volume of 200 mL and a pressure of 350 torr. If temperature is constant, what is the new volume of the gas at 700 torr?
50 mL
100 mL
300 mL
400 mL
Assuming temperature remains constant, how can you decrease the pressure of a gas?
decrease the size of the container
increase the rate of diffusion of gas molecules
increase the number of gas molecules in the container
decrease the mass of the gas molecules
What is the partial pressure of oxygen collected by water displacement if the water temperature is 20.0°C and the total pressure of the gases in the collection bottle is 730.0 mm? (NOTE: Pwater at 20.0°C = 17.5 mm Hg)
17.5 mm Hg
699.8 mm Hg
712.5 mm Hg
747.5 mm Hg
To correct for the partial pressure of water vapor, the vapor pressure of H20 at the collecting temperature is
added to the total gas pressure
subtracted from the total pressure
multiplied by 22.4
divided by 22.4
A 350 mL sample of air collected at 35°C has a pressure of 550 torr. What pressure will the air exert if it is allowed to expand to 425 mL at 57°C?
166.1 torr
7940 torr
485 torr
40.4 torr
The normal respiratory rate for a human being is 15.0 breaths per minute. The averge volume of air for each breath is 505 cm3 at 20°C and 9.95 X 104 Pa. What is the volume of air at STP that an individual breathes in one day (in cubic meters).
166 m3
1.02 m3
9.98 m3
485 m3
A sample of gas at 47°C and 1.03 atm occupies a volume of 2.20 L. What volume would this gas occupy at 107°C and 0.789 atm?
4.31 L
3.41 L
2.06 L
1.10 L
If temperature of a fixed quantity of gas increases, and the pressure remains unchanged,
volume increases
density increases
volume decreases
density decreases
What is 23°C expressed in Kelvin?
296 K
250 K
0 K
-250 K
If you want to study the relationship between temperature and pressure of a gas, which factor must be held constant?
fluidity
kinetic energy
elasticity
volume
What is STP?
0°C and 760 atm
273°C and 760 torr
0 K and 760 mm Hg
273 K and 101.3 kPa
To what temperature must a sample of nitrogen at 27°C and 0.625 atm be taken so that its pressure becomes 1.125 atm at constant volume?
540°C
-267 K
540 K
267 K
A sample of air has a volume of 140.0 mL at 67°C. At what temperature will its volume be 50.0 mL at constant pressure?
121°C
121 K
152°C
-152 K
Why does the pressure increase inside a car tire after it is driven for a while?
the air particles in the tire increase in speed
the volume of the tire decreases
The atmosphere compresses the tire.
the temperature increases
A sample of hydrogen at 47°C exerts a pressure of 0.329 atm. The gas is heated to 77°C at constant volume. What will its new pressure be?
0.54 atm
1.923 atm
2.01 atm
0.360 atm
Which of the following is NOT standard pressure?
10.3 kPa
1 atm
760 torr
760 mmHg
If 4 gases in a cylinder each exert a pressure of 4 atm, what is the total pressure in the cylinder?