Which of the following descriptions and/or equations best represent the enthalpy change of a system? There may be more than one correct answer.

Choose one or more:
A. ΔH = ΔE + PΔV
B. H = E + PV
C. ΔE = q + w
D. The heat absorbed or released during a phase change or chemical reaction at constant volume
E. The work done on or by a phase change or chemical reaction at constant pressure
F. The sum of the internal energy and the pressure-volume product of a system
G. The heat absorbed or released during a phase change or chemical reaction at constant pressure
H. The amount of energy required to raise the temperature of 1 mole of a substance by 1°C at constant pressure