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!

Homework Help: Actual vs MTE Efficiencies of Heat Engines

  1. Apr 8, 2007 #1
    The problem asks: A heat engine takes in 1000J of energy at 1000K and exhausts 600J at 500K. What are the actual and maximum theoretical efffiencies of this heat engine?

    I know the MTE is 1-Tc/Th = 1-500/1000 = .50 = 50%

    I'm not sure if I calculate the actual the same way with the Joules, or if I use n=W/Q?

    If so, that would be 600J/1000K = 60% which would be higher than the MTE. Doesn't seem right...

    Would the correct equation for the actual work be 1-600J/1000J = 1-.6 = .4 = 40% ?
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted