1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Heat flow

  1. Jun 24, 2014 #1
    If heat flow is the momentum change from a faster moving atom or molecule to a slower moving one, and momentum is mass x velocity is it possible - for a very limited amount - for heat to flow from a slower (colder) heavy atom to a faster moving (hotter) atom ?
     
  2. jcsd
  3. Jun 24, 2014 #2

    Philip Wood

    User Avatar
    Gold Member

    (1) It's energy transfer, not momentum transfer, that's relevant.

    (2) It is, I believe, possible in an oblique collision for a faster molecule to pick up speed (and hence KE) from a slower molecule of the same mass.

    (3) But we wouldn't classify this as a flow of heat. To constitute a flow of heat we'd need a net transfer of energy for many molecules.
     
  4. Jun 24, 2014 #3
    I was confusing energy change and momentum change alright

    Thanks Philip
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Heat flow
  1. Heat flow (Replies: 2)

  2. Heat flow (Replies: 13)

  3. Entropy and heat flow (Replies: 2)

  4. Entropy and heat flow (Replies: 0)

  5. Heat flow (Replies: 2)

Loading...