Question

Explain why molar specific heat at constant pressure is greater than the molar heat at constant volume

Answer 1

The heat capacity at constant pressure CP is greater than the heatcapacity at constant volume CV , because when heat is added atconstant pressure, the substance expands and work. QV = CV △T = △U + W = △U because no work is done. Therefore, dU = CV dT and CV = dU dT .