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Gas Laws Study Guide
Combined Gas Law
Millimeters of Mercury
Be able to describe and explain the properties of gases
Be able to describe pressure and its effect on gases
Be able explain the various gas laws and apply them to equations and problems
Be able to convert between degrees Celsius and Kelvins, and between mmHg and atmospheres
1. Convert 25° C to Kelvins.
2. Convert 335 Kelvins to degrees Celsius.
3. What is the freezing temperature of water in Kelvins?
4. How many atmospheres is 340 Torr?
5. How many mmHg is 1.66 atmospheres?
6. Convert 920 mmHg to atmospheres.
Calculations – Decide which law you will use for each calculation
7. A gas has a pressure of 2.4 atmospheres and a volume of 12.5 Liters. If the pressure of the gas decreased to 1.85 atmospheres, what would the new volume of the gas be assuming the temperature and mass remain constant?
8. A gas has a temperature of 300 Kelvins and a pressure of 300 mmHg. Assuming the volume and mass are held constant, if the gas is heated to 445 Kelvins, what would the pressure of the gas be?
9. The pressure and mass of a gas are held constant. The gas has a temperature of 140° Celsius. If the volume of the gas increased from 1.5 L to 4.1 L, what would the final temperature of the gas be?
10. A balloon has a volume of 550 mL and contains 2.5 moles of air. If a person increased the volume by 300 mL, how many moles of air did the person add to the balloon assuming the pressure and temperature are held constant?
11. 785 mL of a gas has a temperature of 310 Kelvins. There are 35 moles of the gas. What is the volume of the gas?
12. A bottle of chlorine gas (Cl2) has an unknown volume. The gas has a total mass of 24.5 grams. The pressure of the gas measures 0.85 atmospheres and the temperature of the gas is at 245 Kelvins. What is the volume of the bottle?