1. Not finding help here? Sign up for a free 30min 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 engine (isovolumeric process)

  1. Oct 29, 2005 #1
    A heat engine has the three step cycle shown above. Starting from point A, 1 L (liter) of ideal gas expands in the isobaric (constant pressure) process A to B at P = 2 atm. B to C is isovolumetric process at V = 5 L, and C to A is an isothermal (constant temperature) compression at 300 K. (Note that the diagram is illustrating V vs P. This should make no difference in your calculations. )

    Find the heat (in J) exhausted in the process B to C if the internal energy of the gas U = 5.0J/K * T

    i'm having trouble with this one,

    it says to find Q exhausted,since it's isovolumetric, W=0, thus delta U = Q

    I found the temperature to B, and tried this equation:

    delta U = 1.5 n R (T(c) - T(b))

    didn't work....

    i just don't know what to do with the internal energy given...any hints?

    (i've already calculated pressure at C to be .4 atm)

    Attached Files:

  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you help with the solution or looking for help too?