AG Chemistry B - The Gas Laws Unit Test (100%)
The volume of a gas is 450 mL when its pressure is 1.00 atm. If the temperature of the gas does not change, what is the pressure when its volume is changed to 2.00 L?
0.225 atm
A gas cylinder contains 2.0 mol of gas X and 6.0 mol of gas Y at a total pressure of 2.1 atm. What is the partial pressure of gas Y?
1.6 atm
A balloon that had a volume of 3.50 L at 25.0°C is placed in a hot room at 40.0°C. If the pressure remains constant at 1.00 atm, what is the new volume of the balloon in the hot room?
3.68 L
Which equation agrees with the ideal gas law?
A) V1/T1 = V2/T2
Which laws can be combined to form the ideal gas law?
Charles's law, Avogadro's law, and Boyle's law
Which law is described by saying that doubling the absolute temperature will double the pressure of a sample of gas in a rigid container?
Gay-Lussac's law
Which law states that the pressure and absolute temperature of a fixed quantity of gas are directly proportional under constant volume conditions?
Gay-Lussac's law
If a gas is moved from a large container to a small container but its temperature and number of moles remain the same, what would happen to the pressure of the gas?
It would increase.
Which statement can best be concluded from the ideal gas law?
The product of pressure and volume of an ideal gas is proportional to the absolute temperature.
Which describes the volume of 1 mol of gas at standard temperature and pressure?
The volume is the same for any gas.
A student uses 0.0821 L• atm/mol • K as the value of the gas constant. What is most likely true about the variables in the ideal gas law?
V has the units of liters, and T has the units of kelvin.
The table below shows a comparison of the different gas laws. Some cells have been left blank. Which are assumed to be constant while using the combined gas law?
number of moles
The gas in the piston is being heated, and the piston has moved upward. The observation will be summarized in a row of the incomplete table below. What are the variables for this piston?
temperature and volume
A container holds 6.4 moles of gas. Hydrogen gas makes up 25% of the total moles in the container. If the total pressure is 1.24 atm. What is the partial pressure of hydrogen?
0.31 atm
What is the temperature of 0.80 mol of a gas stored in a 275 mL cylinder at 175 kPa?
7.2 K
Which equation is derived from the combined gas law?
A) V1/T1 = V2/T2
Which law states that the volume of a gas is proportional to the moles of the gas when pressure and temperature are kept constant?
Avogadro's law
Which equation represents the combined gas law?
C) P1V1/T1 = P2V2/T2
The absolute temperature of a gas is increased four times while maintaining a constant volume. What happens to the pressure of the gas?
It increases by a factor of four
Which best defines partial pressure in a mixture of gases?
pressure that is exerted by one gas as if it occupied a container by itself
If the pressure, volume, and temperature of a gas are known, which can most likely be found by using the ideal gas law?
the molar amount of the gas
If two gases are present in a container, the total pressure in the container is equal to
the sum of the pressures that are exerted by each of the two gases.
If the pressure, volume, and the number of moles of a gas are known, which is needed to calculate the universal gas constant from the ideal gas law?
the temperature of the gas