Which of the following descriptions and/or equations bestrepresents the enthalpy change of a system? There may be more thanone correct answer. A. The heat absorbed or released during a phasechange or chemical reaction at constant pressure B. The work doneon or by a phase change or chemical reaction at constant pressureC. deltaH = deltaE + PdeltaV D. deltaE = q + w E. H= E + PV F. Theheat sborbed or released during a phase change or chemical reactionat constant volume G. The amount of energy required to raise thetemperature of 1 mole of a substance by 1 degree C at constantpressure H. The sum of the internal energy and the pressure-volumeproduct of a system
