Forms of Matter: Gases

Kinetic molecular theory and the gas laws, including the ideal gas law.

9 questions, free, marked as you go with a worked explanation on every one.

What this covers

The questions

  1. A gas occupies 2.0 L at 100 kPa. At constant temperature, what volume does it occupy at 250 kPa?
  2. A gas occupies 2.0 L at 300 K. At constant pressure, what volume does it occupy at 450 K?
  3. How many moles of gas occupy 5.0 L at 101.3 kPa and 298 K? Use R = 8.314 L·kPa/(mol·K).
  4. A gas at 100 kPa fills 4.0 L at 250 K. What pressure does it exert in a 2.0 L container at 300 K?
  5. How many moles are in 11.2 L of an ideal gas at STP, where molar volume is 22.4 L/mol?
  6. A sealed rigid can holds gas at 150 kPa and 300 K. What is the pressure at 400 K?
  7. According to the kinetic molecular theory, why does a gas exert pressure on its container?
  8. Which assumptions does the ideal gas model make? Select all that apply.
  9. Use the table. Using the pattern it shows, what pressure would this gas reach at a volume of 16 L, at the same temperature?

Answer these free