January 2020 NY Regents Chemistry Exam
44 Given the potential energy diagram representing a reaction:
Which numbered interval represents the heat of reaction?
(1) 1
(2) 2 (3) 3
(4) 4
Solution: The heat of reaction is the difference between the energy of products (on the right) and reactants (on the left) which is in interval 2.
Answer: 2
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