Which of the following descriptions and/or equations best represent the enthalpy

Question

Which of the following descriptions and/or equations best represent the enthalpy change of a system? There may be more than one correct answer. The sum of the internal energy and the pressure-volume product of a system. Delta H = Delta E + P Delta V Delta E = q + W The heat absorbed or released during a phase change or chemical reaction at constant volume The work done on or by a phase change or chemical reaction al constant pressure H = E + PV The amount of energy required to raise the temperature of 1 mole of a substance by 1 degree C at constant pressure The heat absorbed and released during a phase change or chemical reaction at constant pressure

Explanation / Answer

The following represnt the enthalphy of a system:

1. The sum of the internal energy and the pressure-volume product of a system

2. delta H = delta E + P delta V

3. The heat absorbed or released during a phase change or chemical reaction at constant volume.

4. H= E + PV

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