Enthalpy and Entropy: What is Enthalpy? The heat capacity of a system at constant pressure is called enthalpy. It is denoted by symbol H. Mathematically, enthalpy is related to internal energy as- H = U + PV In case of gases- PV = nRT (ideal gas equation) H = U + nRT Where, U = internal energy, P = pressure, T = kelvin temperature, R = molar gas constant and V = volume of the system Components of Enthalpy: Enthalpy includes all the components of internal energy and in addition, it also includes PV energy i.e. energy consumed in doing … Continue reading Enthalpy and Entropy