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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
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