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Hess' law

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Which of the following is the best definition of Hess' Law?

A. Heat is always released by the decomposition of 1 mole of a compound into its constitute elements.
B. Since enthalpy is a state function, it will be different if a reaction takes place in one step or a series of steps.
C. Heat evolved in a given process can be expressed as the sum of the heats of several processes that, when added, yield the process of interest.
D. The enthalpy of a process is the difference between the enthalpy of the products and the enthalpy of the reactants.
E. At constant pressure the enthalpy change of a reaction is equal to the heat change of a reaction.

D sounds pretty good.

is it C?


C, I think.

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