The Best Definition of the Enthalpy Change Is ________

The best definition of the enthalpy change is ________

A) the energy that is transferred into or out of a system because of a temperature difference when the pressure is constant and only PV work is done.
B) the change in internal energy of a system when the pressure is constant.
C) the change in internal energy of a system when the volume is constant.
D) the energy that is transferred into or out of a system when the pressure is constant and no work is done.
E) the change in internal energy of a system when the pressure is constant and no work is done.