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: Is delta enthalpy zero for

  1. Dec 12, 2009 #1
    Is delta enthalpy zero for....

    1. The problem statement, all variables and given/known data

    1 mol of ideal gas expands isothermally at 274 K ,from pressure 1.1 atm to 1 atm.It absorbs 8.314 J of heat.Find free energy change.

    2. Relevant equations

    dG=dH-T dS......1
    dS=dq/T
    dH=dU+Work done
    Work done=nRTln(P1/P2).....2
    3. The attempt at a solution
    dU=0
    dH=Work done
    dH=whatever u get in 2
    dG=whatever u get by substituing values in 1.

    But my book says dH=0 because the process is adiabatic.Isn't that wrong?
     
  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