Pressure and volume = constant

• What causes pressure in gases?

  Gas particles colliding with container walls
• How can we increase the pressure of a gas?

  By increasing temperature, number of particles, or decreasing volume
• What is the relationship between pressure and volume of a gas?

  Pressure and volume are inversely related
• What does the equation \(PV = \text{constant}\) represent?

  Pressure times volume equals a constant value
• If the volume of a gas increases, what happens to its pressure?

  The pressure decreases
• What is the pressure of a gas occupying 1.5 m³ at 100 Pa?

  150
• How do you calculate the pressure of a gas when its volume changes?

  Use \(PV = \text{constant}\)
• What is the pressure exerted by a gas compressed to 0.3 m³ if the original pressure was 100 Pa at 1.5 m³?

  500 Pa
• What is the alternative method to find pressure when volumes change?

  Use \(P_1V_1 = P_2V_2\)
• What is the pressure of air compressed from 1800 liters to 12 liters at 101 kPa?

  15,150 kPa
• What units are used for atmospheric pressure in the example?

  Kilopascals
• What are the steps to calculate pressure when volume changes?

  1. Identify initial pressure and volume.
  2. Identify final volume.
  3. Use \(PV = \text{constant}\) or \(P_1V_1 = P_2V_2\).
  4. Solve for unknown pressure.
• What factors affect gas pressure?

  • Temperature
  • Number of gas particles
  • Volume of the container