Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Gas pressure and expansion of gas

  1. Apr 6, 2016 #1
    Consider a gas in a cylinder with a piston. When heat is supplied to gas, there will be work done by the gas on the piston-- gas expands. My question is: as the gas expands, why would there be a decrease in pressure of the gas as the volume increases and the piston moves up? I know because Boyle's law says so but can someone please give me an answer of what is exactly happening please? Because I thought as gas particles gain energy from heat, they move faster hence hit the piston harder (i.e. a greater force exerted on the piston). If soshouldn't gas pressure increase as volume increases due to P=F/A?
     
  2. jcsd
  3. Apr 6, 2016 #2

    ProfuselyQuarky

    User Avatar
    Gold Member
    2016 Award

    You have to ask this question in the appropriate forum :)
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Gas pressure and expansion of gas
  1. Peer pressure (Replies: 2)

Loading...