Question Detail

CHM 101 CHM 101 Past Questions Objective Question
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Question

A reaction has ΔH > 0 and ΔS > 0. Under what condition is the reaction spontaneous?
Options
A At low temperature
B At any temperature
C At high temperature
Correct Answer
D It is never spontaneous
Correct Answer

Option C is the correct answer.

Detailed Explanation

Spontaneity is determined by ΔG = ΔH - TΔS. If ΔH is positive and ΔS is positive, the term -TΔS is negative. At sufficiently high temperatures, the magnitude of TΔS will exceed ΔH, making ΔG negative and the reaction spontaneous.

Hint

Analyze the Gibbs free energy equation. How does the -TΔS term change with temperature?

Question Info

Course: CHM 101
Topic: CHM 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 261 of 1872
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