can any one tell me when to use Cp and Cv while calculating internal energy.in adiabatic and polytropicprocess why do we say int. energy = nCvt and not nCpt?/??(while we know that Cv is applied at const. vol. and Cp at const. press.)why is then E=nCvdT applicable to all cases but nCpdT not????

Navjyot Kalra , 11 Years ago

Grade 10