Explore BrainMass

Explore BrainMass

    First law of Thermodynamics, Entropy and Enthalpy

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    Please help with the problems involving applied heat thermodynamics.

    3. Calculate the change in enthalpy during a compression process in which the work done on the working medium is 24 kJ, and the change in internal energy is 36 kJ.
    Heat added or rejected

    4. Derive the numerical ratio ---------------------------- for
    Work done
    (a) an adiabatic process
    (b) an isothermal process.

    See attached file for full problem description.

    © BrainMass Inc. brainmass.com October 9, 2019, 7:10 pm ad1c9bdddf


    Solution Preview

    Please see the attached file.

    1. Change in enthalpy dH = dU+ PdV, where dU is the change in internal energy and PdV =dW is the work done due to compression of gas

    Here dU=36 kJ,
    PdV=24 kJ, dH = 36 + 24 = 60 ...

    Solution Summary

    From the first law of Thermodynamics, the entropy and enthalpy for an adiabaic and isothermal process is calculated.