AP Chemistry: 6.2 Energy Diagrams – Exam Style questions with Answer- MCQ

Question

\(XY_{2} → X + Y_{2}\) The equation above represents the decomposition of a compound \(XY_{2}\). The diagram below shows two reaction profiles (path one and path two) for the decomposition of\( XY_{2}\).

Which of the following most likely accounts for the difference between reaction path one and reaction path two?

(A) A higher temperature in path one

(B) A higher temperature in path two

(C) The presence of a catalyst in path one

(D) The presence of a catalyst in path two

▶️Answer/Explanation

Ans:D

Question

Based on the bond energies shown in the table above, which of the following diagrams best represents the change in energy as the reaction represented below proceeds?

\(H_{2}(g) + Cl_{2}(g) \rightarrow  2HCl(g)\)

▶️Answer/Explanation

Ans:C

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