Pressure and volume

• 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
• How do you calculate the constant in the equation \( PV = \text{constant} \)?

  Multiply pressure by volume
• What is the pressure exerted by a gas occupying 1.5 m³ at 100 pascals when compressed to 0.3 m³?

  500 pascals
• What is the alternative method to find pressure without calculating the constant?

  Use \( P_1 V_1 = P_2 V_2 \)
• In the equation \( 100 \times 1.5 = P_2 \times 0.3 \), what does \( P_2 \) represent?

  The unknown pressure after compression
• What is the pressure of 1800 liters of air compressed into a 12-liter cylinder at 101 kilopascals?

  15,150 kilopascals
• Why do we use kilopascals for atmospheric pressure in calculations?

  Because atmospheric pressure is given in kilopascals
• What are the steps to calculate pressure using the gas laws?

  1. Identify initial pressure and volume.
  2. Use \( PV = \text{constant} \) or \( P_1 V_1 = P_2 V_2 \).
  3. Rearrange to solve for unknown pressure.
  4. Substitute known values and calculate.