Pressure in Gases (T)

• What causes the pressure of a gas?

  Particles colliding with container walls
• What does the force from particle collisions act upon?

  Walls of the gas container
• How does increasing the volume of a gas affect its pressure?

  It reduces the pressure
• Why does increasing the volume reduce gas pressure?

  Particles travel further before colliding
• What is the relationship between pressure and volume of a gas?

  Pressure is inversely proportional to volume
• What equation represents the relationship between pressure and volume?

  Pressure × Volume = Constant
• Under what condition is the pressure-volume equation valid?

  Temperature must be kept constant
• If the pressure of a gas doubles, what happens to its volume?

  Volume must halve
• What is the pressure of a gas with a volume of $2 \text{ m}^3$ and pressure of $400,000 \text{ Pa}$ when the volume increases to $6 \text{ m}^3$?


  $133,334 \text{ Pa}$
• If a gas has a volume of $10 \text{ m}^3$ and pressure of $50,000 \text{ Pa}$, what is the pressure when the volume increases to $50 \text{ m}^3$?


  $10,000 \text{ Pa}$
• What is the new volume of a gas if its initial volume is $5 \text{ m}^3$ and pressure decreases from $150,000 \text{ Pa}$ to $50,000 \text{ Pa}$?


  $15 \text{ m}^3$
• What are the key concepts related to gas pressure and volume?

  • Pressure is due to particle collisions
  • Force acts at right angles to container walls
  • Increasing volume reduces pressure
  • Pressure is inversely proportional to volume
  • Equation: Pressure × Volume = Constant (at constant temperature)
• What steps should you follow to calculate changes in gas pressure or volume?

  1. Identify initial pressure and volume
  2. Determine the change in volume or pressure
  3. Apply the inverse relationship
  4. Calculate the new pressure or volume