Hess's Law of Constant Heat Summation (or just Hess's Law) states that regardless of the multiple stages or steps of a reaction, the total enthalpy change for the reaction is the sum of all changes.
Analyze each option:
Hess's law is based on:
A. Law of conservation of mass
B. Law of conservation of energy
C. Second law of thermodynamics
D. None of the above
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