UNIT 2: GASES
Scientist: ____________________
Per:
_________
Date:
_________
#6
Objective #1: Represent the relationships between gas temperature, volume, and pressure mathematically
Combined Gas Law: Mixed Problem Set
Boyle’s Law
P1V1  P2V2
Charles Law
V1 V2

T1 T2
Gay Lussac’s Law
P1 P2

T1 T2
Combined Gas Law
P1V1 P2V2

T1
T2
Absolute Temperature Conversion: K = oC + 273
Gas Law Practice Problems
1. 28 liters of oxygen gas at in a balloon is at Standard Pressure (1 atm). The gas is then forced into a 4L diving
tank under high pressure. What is the pressure of the compressed oxygen?
Cause: _____________ is ________________
Effect: ____________ will __________________
2. A balloon at -73 °C with 5 L of gas is heated to 327 °C. What is the volume? Assume the pressure is constant.
Cause: _____________ is ________________
Effect: ____________ will __________________
3. An aerosol can containing 0.5 liters of nitrogen is at 1 atm and 0oC. What will the volume change to if the
pressure triples to 2 atm and temperature remains constant
Cause: _____________ is ________________
Effect: ____________ will __________________
4. A Mickey Mouse balloon contains 4 liters of helium at 27oC. If the balloon is let go and rises up through the
atmosphere, the temperature of the gas will cool to -173oC. If pressure were held constant, what will the
volume be?
Cause: _____________ is ________________
Effect: ____________ will __________________
6. A balloon at 5 atm is placed in the sun at 77°C. After a long day, the pressure is measured at 3 atm. What
must the new temperature be ( in oC) ? Assume the volume is constant.
Cause: _____________ is ________________
Effect: ____________ will __________________
7. A container with 1.2 L of gas is at 6 atm. When the gas is compressed the pressure rises to 10 atm. What is
the new volume?
Cause: _____________ is ________________
Effect: ____________ will __________________
8. A container with gas at 350 kPa and 40 K is cooled to 10 K. What is the new pressure? Assume the volume is
constant.
Cause: _____________ is ________________
Effect: ____________ will __________________
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9. A balloon at 50 °C with 2 L of gas is heated and the volume increases to 8 L. What is the new temperature?
Assume the pressure is constant.
Cause: _____________ is ________________
Effect: ____________ will __________________
10. One mole of N2 takes up 22.4L at Standard Temperature and Pressure (1 atm and 0oC). What is the volume
of 1 mole of N2 if the pressure is decreased to 0.5 atm, and the temperature remains constant?
Cause: _____________ is ________________
Effect: ____________ will __________________
11. 5 liters of nitrogen gas is at Standard Temperature and Pressure (1 atm and 0oC). What is the volume of if
the temperature rises to 200oC and the pressure remains constant?
Cause: _____________ is ________________
Effect: ____________ will __________________
12. Consider two samples of gas under the same Standard Temperature and Pressure conditions (1 atm and
0oC). Each gas begins with an equal volume: 22.4 liters of nitrogen gas and 22.4 liters of fluorine gas. As the
nitrogen is heated under constant pressure to 600K, its volume expands. The fluorine gas is kept at a constant
temperature, but the pressure is reduced to 0.33 atm, so it expands also. Which gas will expand more?
Nitrogen
Cause: _____________ is ________________
Effect: ____________ will __________________
Fluorine
Cause: _____________ is ________________
Effect: ____________ will __________________
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