Question Detail

CHM 101 CHM 101 Past Questions Objective Question
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Question

What happens to the value of ΔH for a thermochemical reaction if the reaction is reversed?
Options
A ΔH has the same numerical value, and the sign changes.
Correct Answer
B ΔH has the same numerical value, and the sign remains the same.
C ΔH is the reciprocal of the original value, and the sign changes.
D ΔH is the reciprocal of the original value, and the sign remains the same.
Correct Answer

Option A is the correct answer.

Detailed Explanation

Reversing a reaction changes the sign of ΔH but the magnitude remains the same. If the forward reaction is exothermic (negative ΔH), the reverse is endothermic (positive ΔH).

Hint

Think of reversing the direction: heat absorbed becomes heat released.

Question Info

Course: CHM 101
Topic: CHM 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 1190 of 1872
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