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: Find the maximum thermodynamic efficiency

  1. Apr 22, 2016 #1
    1. The problem statement, all variables and given/known data
    If an engine operates between 250°C and 25°C, what is its maximum thermodynamic efficiency?

    2. Relevant equations
    3. The attempt at a solution

    In this question,which one should I use K or ºC ?
    thank you
  2. jcsd
  3. Apr 22, 2016 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    What does Carnot's Theorem say about this?

  4. Apr 22, 2016 #3
    If you always use Kelvin you will avoid ever worrying about this again. Always just convert to Kelvin before doing anything else and you won't go wrong. The only time to use Celsius in thermodynamics or heat transfer is if the question want the answer in Celsisus - in that case convert to Celsius at the very last step after using Kelvin for calculations.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted