All of the Following Statements Are True EXCEPT

All of the following statements are true EXCEPT

A) Hess' law states that ΔH for an overall reaction is the sum of the ΔH values for the individual equations.
B) the molar enthalpy of formation of a compound is equal to the enthalpy change when one mole of the compound is formed from elements.
C) a reaction with a negative enthalpy is exothermic.
D) the enthalpy of formation of an element in its most stable state is equal to zero.
E) the sum of the enthalpies of formation of the products in a chemical reaction is defined as the enthalpy of reaction.