June 2017 NY Regents Chemistry Exam
23 In chemical reactions, the difference between the potential energy of the products and the potential energy of the reactants is equal to the
(1) activation energy
(2) ionization energy
(3) heat of reaction
(4) heat of vaporization
Solution: The difference between the potential energy of the products and the potential energy of the reactants is equal to the heat of reaction.
Answer: 3
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