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: Carnot Engine

  1. Feb 24, 2010 #1
    1. The problem statement, all variables and given/known data

    A Carnot engine working with a monatomic gas operating between two temps, 288K and 497K. The engine performs 800 J of net work.



    2. Relevant equations

    Q = nRT ln (V final/V initial)


    3. The attempt at a solution
    I don't have enough info for the above equation. I know I am missing something just not sure what.
     
  2. jcsd
  3. Feb 24, 2010 #2

    rock.freak667

    User Avatar
    Homework Helper

    What are you to find?
     
  4. Feb 25, 2010 #3
    Sorry, that would have been helpful.

    Need to find heat absorbed and heat released, also efficiency, but I think I got that one
     
  5. Feb 25, 2010 #4
    Yeah that would be helpful huh?

    Need to find heat absorbed and heat released, also efficiency but I think I figured that out.
     
  6. Feb 25, 2010 #5

    rock.freak667

    User Avatar
    Homework Helper

    You should know that for a Carnot engine, the efficiency is given by

    [tex]\eta = \frac{W}{Q_H}=1 - \frac{T_C}{T_H}[/tex]


    Now that you know this, I think you can easily find QH
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook