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Gas Volume and Pressure Calculations: Understanding Gas Laws

Explore calculations involving gas volumes and pressures using formulas from gas laws. Determine the volume of a gas under standard pressure, find how temperature affects gas expansion, and calculate pressure variations inside containers (like soda cans) under temperature changes. The problem set includes scenarios with different gases such as argon, chlorine, hydrogen, and helium. Evaluate effusion rates and average kinetic energies to understand molecular behavior. Great for students studying chemistry or physics concepts related to gases.

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Gas Volume and Pressure Calculations: Understanding Gas Laws

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  1. A gas occupies 2.2L at 425 kPa. Determine its volume at standard pressure. The temperature does not change.

  2. 9.2 L

  3. At room temperature (21°C), the pressure of carbon dioxide in an unopened soda can is 207kPa. Find the pressure of the carbon dioxide in the soda can if left in the trunk of a car on a hot summer day (72°).

  4. 242 kPa

  5. A gas occupies 15.7L at 28°C and 658mmHg. At what temperature will it expand to 20.5L at a pressure of 595mmHg?

  6. 355K

  7. Find the volume occupied by 12.2g of argon gas at 23°C and 115kPa.

  8. 6.54L

  9. At what temperature will 5.0g of chlorine fill a 950mL flask at 125kPa?

  10. 202K

  11. What mass of hydrogen gas was collected in a eudiometer if the volume was 35.2mL, the temperature was 23°C and the pressure of the dry hydrogen was 94.2kPa?

  12. 0.00270g

  13. A student blows up a balloon to a volume of 23.1L at 21.4°C. He then places the balloon in an ice water bath, where the temperature is 2.5°C. Find the new volume of the balloon.

  14. 21.6L

  15. A gas occupies 14.5L at 28°C and 450mmHg. Determine its volume at STP.

  16. 7.8L

  17. A student collects hydrogen over water at 23°C. The pressure in the room is 99.2kPa. The water vapor pressure at 23°C is 2.8kPa. Find the pressure of the dry hydrogen gas.

  18. 96.4 kPa

  19. Which gas below would effuse at the fastest rate: • A. Hydrogen • B. Argon • C. Helium • D. Carbon monoxide

  20. A. hydrogen

  21. A sample of hydrogen and a sample of helium are both in 2.0L tanks at 24°C and 795mmHg. • Which tank has more molecules?

  22. They have the same number of molecules!

  23. A sample of hydrogen and a sample of helium are both in 2.0L tanks at 24°C and 795mmHg. • Which tank has is heavier?

  24. helium

  25. A sample of hydrogen and a sample of helium are both in 2.0L tanks at 24°C and 795mmHg. • Which gas has the higher average kinetic energy?

  26. They have the same average kinetic energy

  27. Find the density of nitrogen dioxide at STP.

  28. 2.05 g/L

  29. Find the density of nitrogen dioxide at 25°C and 96kPa.

  30. 1.8 g/L

  31. Find the molar mass of a gas if 12.2g of a gas occupies 2.44L at 94kPa and 24°C. The gas is a monoatomic element. Identify the gas.

  32. 131.3 g/mol Xe

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