Gas pressure

• • Since particles in a gas move fast and randomly, collisions occur frequently
  • The force acting on the container due to these collisions is at right angles to the container
• Atmospheric pressure


  The weight of air resting on the Earth's surface
• The pressure in the atmosphere at sea level is about 100,000N/m^2
• • When a gas is heated, the particles have more kinetic energy and move faster
  • If the volume doesn't change the particles hit harder and more often causing the pressure to rise