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: Internal combustion engine problem.

  1. Feb 22, 2008 #1
    An internal combustion engine runs on octane, the enthalpy of combustion is -5512 kJ/mol. The mass of 1 gallon of fuel is 3 kg.
    The engine temperature is 2000 degrees C and the exit temperature is 800 degrees C. What is the work done?

    The total enthalpy is -145053 kJ. The total number of moles of octane is 26.3. The molar mass of octane is .1142 kg/mol

    I spent a good deal of time on this, and I am not sure how to conceptualize this problem.

    *I edited the problem so you don't have to read the poorly written original problem. *
     
    Last edited: Feb 22, 2008
  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