chem q3 gas questions
A 0.225-L flask contains CH4 at 27 °C and 318 mm Hg. What is the pressure of the CH4 if the volume is increased to 0.500 L and the temperature increased to 95 °C?
176 mm Hg
If 4 moles of gas are added to a container that already holds 1 mole of gas, how will the pressure change inside the container?
The pressure will be five times higher.
If the volume of a container of gas is reduced, what will happen to the pressure inside the container?
The pressure will increase.T
A gas occupies a volume of 2.4 L at 14.1 kPa. What volume will the gas occupy at 84.6 kPa?
0.40 L
A balloon originally had a volume of 4.39 L at 44 °C and a pressure of 729 torr. The balloon must be cooled to __________°C to reduce its volume to 3.78 L (at constant pressure).
0
The amount of gas that occupies 60.82 L at 31°C and 48.9 kPa is __________ mol.
1.18
A 0.325 L flask filled with gas at 92.4 kPa and 19°C contains __________ mol of gas.
1.24 ´ 10^-2
A gas in a 0.325 L container has a pressure of 92.5 kPa at 19°C. There are __________ mol of gas in the flask.
1.24 ´ 10^-2
A balloon is filled with He gas to a volume of 3.22 L at 32 °C. The balloon is placed in liquid nitrogen until its temperature reaches -132 °C. Assuming the pressure remains constant, what is the volume of the cooled balloon?
1.49 L
qAt a temperature of __________ °C, 0.444 mol of CO gas occupies 11.8 L at 118 kPa.
107
A sample of gas (24.2 g) initially at 4.00 atm was compressed from 8.00 L to 2.00 L at constant temperature. After the compression, the gas pressure was __________ atm.
16.0
A sample of a gas originally at 25°C and 1.00 atm pressure in a 2.5 L container is allowed to expand until the pressure is 0.85 atm and the temperature is 15°C. The final volume of the gas is __________ L.
2.8
The pressure exerted by 1.3 mol of gas in a 13 L flask at 22°C is __________ kPa.
250
A gas originally at 27°C and 1.00 atm pressure in a 3.9 L flask is cooled at constant pressure until the temperature is 11°C. The new volume of the gas is __________ L.
3.7
A sample of gas occupies 17 mL at -112C. Assuming the pressure is held constant, what volume does the sample occupy at 70C?
36mL
The volume of 0.25 mol of a gas at 72.7 kPa and 15°C is __________ L.
8.2
The ideal gas law combines Boyle's law, Charles's law, and
Avogadro's law
The volume of a gas is reduced from 4.0 L to 0.5 L while the temperature is held constant. How does the gas pressure change?
It decreases by a factor of eight.
The volume of a gas is doubled while the temperature is held constant. How does the gas pressure change?
It is reduced by one half.
What happens to the pressure of a gas inside a container if the temperature of the gas decreases?
The pressure decreases.
Why does the pressure inside a container of gas increase if more gas is added to the container?
There is an increase in the number of collisions between particles and the walls of the container.
At a certain temperature and pressure, 0.20 mol of carbon dioxide has a volume of 3.1 L. A 3.1-L sample of hydrogen at the same temperature and pressure
contains the same number of molecules.
q
q
Charles's law states that the ____.
volume of a gas is directly proportional to its temperature in kelvins
Boyle's law states that the ____.
volume of a gas varies inversely with pressure
