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Given the potential energy diagram representing a reaction:Which numbered interval represents th

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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