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Topic 1 – Matter and Energy
34. Combined gas laws : Concept facts and definitions
1. If the Kelvin temperature of a gas is doubled while the pressure is halved, the volume of the gas will
1) Remain the same 3) Decrease by half
2) Increase 2 times 4) Increase 4 times
2. As the Kelvin temperature of a gas is halved and the pressure is doubled, the volume of the gas will
1) Increase 4 times as much 3) Decrease to half
2) Decrease by 4 4) Remains the same
3. Under which conditions would a volume of a given sample of a gas decrease?
1) Decrease pressure and increase temperature
2) Decrease pressure and decrease temperature
3) Increase pressure and decrease temperature
4) Increase pressure and increase temperature
4. The volume of a 1.0 mole sample of an ideal gas will increase when the
1) Pressure decreases and the temperature decreases
2) Pressure decreases and the temperature increases
3) Pressure increases and the temperature decreases
4) Pressure increases and the temperature increases
35. Gas Law : Combined gas law calculations
1. At a temperature of 273.0 K , a 400.0 milliliter gas sample has a pressure of 101.3 Kpa. If the pressure
is changed to 50.65 kPa, at what temperature will the gas have a volume of 551 milliliters?
1) 100 K 2) 273 K 3) 188 K 4) 546 K
2. A gas sample has a volume of 1.4 L at a temperature of 20.K and a pressure of 1.0 atm. What will be
the new volume when the temperature is changed to 40.K and the pressure is changed to 0.50 atm ?
1) 0.35 L 2) 0.75 L 3) 1.4 L 4) 5.6 L
3. A sample of hydrogen gas occupies a volume of 15.0 liters at a pressure of 2.00 atmospheres and a
temperature of 300 K. If the temperature is raised to 400 K, what pressure will allow the hydrogen to
occupy a volume of 40.0 liters?
1) 0.5 atm 2) 1.0 atm 3) 2.0 atm 4) 4.0 atm
4. At STP, a gas has a volume of 4.0 L. If the temperature of the gas is changed to 600 K and the
pressure is increased to 160 kPa, what is the new volume of the gas sample? 4) 8.0 L
1) 2.8 L
3) 5.6 L
2) 4.0 L
o
5. At 40 C and 2 atm, the volume of a sample of O2(g) is 380 ml. What will be the new volume of the
O2(g) at STP?
1) 57 .5 ml 2) 111 ml 3) 871 ml 4) 663 ml
o Need Help? Study Book Pg 26 Set 42
6. A gas occupies a volume of 3 L at 1.5 atm and 80 C. Which setup is correct for calculating the new
o
volume of the gas if the temperature is changed to 150 C and the pressure is dropped to 1.0 atm?
1.5 x 150 1.5 x 423
1) 3 x 3) 3 x 1 x 353
1 x 80
1.5 x 80
2) 3 x 4) 3 x 1.5 x 353
1 x 150 1 x 423
142 Copyright © 2010 E3 Scholastic Publishing. All Rights Reserved. Survivingchem.com
Topic 1 – Matter and Energy
34. Combined gas laws : Concept facts and definitions
1. If the Kelvin temperature of a gas is doubled while the pressure is halved, the volume of the gas will
1) Remain the same 3) Decrease by half
2) Increase 2 times 4) Increase 4 times
2. As the Kelvin temperature of a gas is halved and the pressure is doubled, the volume of the gas will
1) Increase 4 times as much 3) Decrease to half
2) Decrease by 4 4) Remains the same
3. Under which conditions would a volume of a given sample of a gas decrease?
1) Decrease pressure and increase temperature
2) Decrease pressure and decrease temperature
3) Increase pressure and decrease temperature
4) Increase pressure and increase temperature
4. The volume of a 1.0 mole sample of an ideal gas will increase when the
1) Pressure decreases and the temperature decreases
2) Pressure decreases and the temperature increases
3) Pressure increases and the temperature decreases
4) Pressure increases and the temperature increases
35. Gas Law : Combined gas law calculations
1. At a temperature of 273.0 K , a 400.0 milliliter gas sample has a pressure of 101.3 Kpa. If the pressure
is changed to 50.65 kPa, at what temperature will the gas have a volume of 551 milliliters?
1) 100 K 2) 273 K 3) 188 K 4) 546 K
2. A gas sample has a volume of 1.4 L at a temperature of 20.K and a pressure of 1.0 atm. What will be
the new volume when the temperature is changed to 40.K and the pressure is changed to 0.50 atm ?
1) 0.35 L 2) 0.75 L 3) 1.4 L 4) 5.6 L
3. A sample of hydrogen gas occupies a volume of 15.0 liters at a pressure of 2.00 atmospheres and a
temperature of 300 K. If the temperature is raised to 400 K, what pressure will allow the hydrogen to
occupy a volume of 40.0 liters?
1) 0.5 atm 2) 1.0 atm 3) 2.0 atm 4) 4.0 atm
4. At STP, a gas has a volume of 4.0 L. If the temperature of the gas is changed to 600 K and the
pressure is increased to 160 kPa, what is the new volume of the gas sample? 4) 8.0 L
1) 2.8 L
3) 5.6 L
2) 4.0 L
o
5. At 40 C and 2 atm, the volume of a sample of O2(g) is 380 ml. What will be the new volume of the
O2(g) at STP?
1) 57 .5 ml 2) 111 ml 3) 871 ml 4) 663 ml
o Need Help? Study Book Pg 26 Set 42
6. A gas occupies a volume of 3 L at 1.5 atm and 80 C. Which setup is correct for calculating the new
o
volume of the gas if the temperature is changed to 150 C and the pressure is dropped to 1.0 atm?
1.5 x 150 1.5 x 423
1) 3 x 3) 3 x 1 x 353
1 x 80
1.5 x 80
2) 3 x 4) 3 x 1.5 x 353
1 x 150 1 x 423
142 Copyright © 2010 E3 Scholastic Publishing. All Rights Reserved. Survivingchem.com
