Flag Thermal Physics> plz help.Conceptual doubt.H(enthaly)=E+PV...
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plz help.Conceptual doubt.


H(enthaly)=E+PV


Differentiating,we get,H = E + (PV)


=nCvdT + PV + VP


=nCvdT + nRT + VP


For isothermal process,dT=0,T=0


hence, H = 0 + 0 + VP = VP


BUT FOR ISOTHERMAL PROCESSES, IT IS SAID U=0,H=0


EXPLAIN!!!!!!!!!!!!!!!



Shane Macguire , 11 Years ago
Grade upto college level
anser 1 Answers
Naveen Kumar

Last Activity: 10 Years ago

H=U=PV
differentiating,
dH=dU+d(PV)
put PV=nRT
dH=dU+nRdT
Now if the process is isotermal,
dT=0
and if dU=0
then dH=0
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