Factors Affecting Gas Pressure

• How do gas particles move in a container?

  They move in completely random directions
• What happens when gas particles hit the walls of a container?

  They rebound and change direction
• What do gas particles exert when they collide with container walls?

  A force
• What is pressure defined as?

  Force exerted per unit area
• What two factors mainly determine total pressure in a gas?

  Number of collisions and energy of collisions
• How does temperature affect gas pressure?

  Pressure increases with temperature
• What happens to gas particles when heated?

  They move faster and collide more
• What is the effect of increasing concentration on gas pressure?

  Higher concentration leads to higher pressure
• What happens to pressure if the volume of a container is decreased?

  Pressure increases as volume decreases
• How does a flexible container like a balloon behave with changes in temperature and concentration?

  It changes volume rather than pressure
• What happens to a balloon when the number or force of collisions increases?

  The balloon expands rather than increases pressure
• What should you be aware of regarding expandable containers?

  They complicate pressure calculations
• What are the main factors affecting gas pressure?

  • Temperature: Higher temperature increases pressure
  • Concentration: More particles increase pressure
  • Volume: Smaller volume increases pressure
• How do gas particles behave in a fixed container?

  • Move randomly
  • Collide with walls
  • Exert force creating pressure
• What happens to gas pressure in a flexible container like a balloon?

  • Changes in temperature and concentration affect volume
  • Increased collisions cause expansion, not pressure increase