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Topic 1 – Matter and Energy
28. Gas Law at Constant Temperature: Recalling concept facts
1. At constant temperature, the volume of a confined gas varies
1) Directly with the pressure 3) Directly with the mass of the gas
4) Indirectly with the mass of the gas
2) Indirectly with the pressure
2. At constant temperature, as pressure of a gas in a closed cylinder increases, volume of the gas
2) Decreases
3) Remains the same
1) Increases
3. At constant temperature, as the pressure of a gas in a cylinder is decreased by half, the volume of
the gas will 3) Increase 2 folds
1) Remain the same
2) Decrease by half 4) Increase by 4 folds
4. A gas is at STP. If the temperature of the gas is held constant while the volume of the gas is cut in
half, the pressure of the gas will be 3) Halve
1) Double
2) Triple 4) Quadruple
Need Help? Study Book Pg 22 Set 33
5. Which graph best illustrates the relationship between pressure and volume of a gas when the
temperature is held constant?
1) 2) 3) 4)
29. Gas law at Constant Temperature: Pressure – Volume calculations
1. At constant temperature, a gas at 2 atm of pressure has a volume of 6 L. What will be the new
volume if the pressure is changed to 4 atm?
1) 6.0 L 2) 8.0 L 3) 3 L 4) 12.0 L
2. The pressure on 80 milliliters of a gas at constant temperature is changed from 16 atm to 8 atm. The
new volume of the gas is 2) 40 ml 3) 5 ml 4) 10 ml
1) 160 ml
3. A gas sample occupies 10. ml at 1.0 atmospheric pressure. If the volume changes to 20. ml and the
temperature remains the same, the new pressure will be 3) 0.25 atm 4) 0.50 atm
2) 2.0 atm
1) 1.0 atm
4. The volume of a CO2(g) changes from 50 ml to 100 ml when pressure on the gas is changed to 0.6
atm. If the temperature of the gas is constant, what was the initial pressure on the gas?
1) 1.2 atm 2) 0.3 atm 3) 60 atm 4) 2 atm
5. A 60 ml sample of hydrogen gas is at STP. If the temperature of the gas is held constant and the
pressure is changed to 3 atm, what will the new volume of the hydrogen gas be?
1) 20 ml 2) 180 ml 3) 1 ml 4) 0.05 ml Need Help? Study Book Pg 24 Set 39
6. A 2.0 L sample of O2(g) at STP had its volume changed to 1.5 L. If the temperature of the gas was
held constant, what is the new pressure of the gas in kilopascal?
1) 3.0 kPa 2) 152 kPa 3) 101.3 kPa 4) 135 kPa
7. A 500 ml sample of a gas has its pressure change from 30 kPa to 15 kPa. If the temperature is held
constant, the new volume of the gas can calculated from which set up?
1) 15 x 30 2) 500 x 30 3) 500 x 15 4) 15 x 30 x 500
15 30
500
Copyright©2010 E3 Scholastic Publishing. All Rights Reserved. SurvivingChem.com 139
Topic 1 – Matter and Energy
28. Gas Law at Constant Temperature: Recalling concept facts
1. At constant temperature, the volume of a confined gas varies
1) Directly with the pressure 3) Directly with the mass of the gas
4) Indirectly with the mass of the gas
2) Indirectly with the pressure
2. At constant temperature, as pressure of a gas in a closed cylinder increases, volume of the gas
2) Decreases
3) Remains the same
1) Increases
3. At constant temperature, as the pressure of a gas in a cylinder is decreased by half, the volume of
the gas will 3) Increase 2 folds
1) Remain the same
2) Decrease by half 4) Increase by 4 folds
4. A gas is at STP. If the temperature of the gas is held constant while the volume of the gas is cut in
half, the pressure of the gas will be 3) Halve
1) Double
2) Triple 4) Quadruple
Need Help? Study Book Pg 22 Set 33
5. Which graph best illustrates the relationship between pressure and volume of a gas when the
temperature is held constant?
1) 2) 3) 4)
29. Gas law at Constant Temperature: Pressure – Volume calculations
1. At constant temperature, a gas at 2 atm of pressure has a volume of 6 L. What will be the new
volume if the pressure is changed to 4 atm?
1) 6.0 L 2) 8.0 L 3) 3 L 4) 12.0 L
2. The pressure on 80 milliliters of a gas at constant temperature is changed from 16 atm to 8 atm. The
new volume of the gas is 2) 40 ml 3) 5 ml 4) 10 ml
1) 160 ml
3. A gas sample occupies 10. ml at 1.0 atmospheric pressure. If the volume changes to 20. ml and the
temperature remains the same, the new pressure will be 3) 0.25 atm 4) 0.50 atm
2) 2.0 atm
1) 1.0 atm
4. The volume of a CO2(g) changes from 50 ml to 100 ml when pressure on the gas is changed to 0.6
atm. If the temperature of the gas is constant, what was the initial pressure on the gas?
1) 1.2 atm 2) 0.3 atm 3) 60 atm 4) 2 atm
5. A 60 ml sample of hydrogen gas is at STP. If the temperature of the gas is held constant and the
pressure is changed to 3 atm, what will the new volume of the hydrogen gas be?
1) 20 ml 2) 180 ml 3) 1 ml 4) 0.05 ml Need Help? Study Book Pg 24 Set 39
6. A 2.0 L sample of O2(g) at STP had its volume changed to 1.5 L. If the temperature of the gas was
held constant, what is the new pressure of the gas in kilopascal?
1) 3.0 kPa 2) 152 kPa 3) 101.3 kPa 4) 135 kPa
7. A 500 ml sample of a gas has its pressure change from 30 kPa to 15 kPa. If the temperature is held
constant, the new volume of the gas can calculated from which set up?
1) 15 x 30 2) 500 x 30 3) 500 x 15 4) 15 x 30 x 500
15 30
500
Copyright©2010 E3 Scholastic Publishing. All Rights Reserved. SurvivingChem.com 139
