If `DeltaH` is the enthalpy change and `DeltaU` the change in internal energy accompanying a gaseous reaction, then

Options

A. `Delta H` is always greater than `Delta E`
B. `Delta H lt Delta E` only if the number of moles of the products is greater than the number of the reactants
C. `Delta H` is always less than `Delta E`
D. `Delta H lt Delta E` only if the number of moles of the products is less than the number of moles of the reactants

Answer

D