Question Detail

CHM 101 CHM 101 Past Questions Objective Question
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Question

At temperatures above 0 °C, ice melts spontaneously because:
Options
A Melting releases heat, making Delta S_surr strongly positive
B The increase in system entropy (Delta S_sys > 0) outweighs the heat absorption penalty
Correct Answer
C The enthalpy change of fusion becomes negative above 0 °C
D Absolute zero is approached as heat is absorbed
Correct Answer

Option B is the correct answer.

Detailed Explanation

Melting absorbs heat (endothermic), but the large increase in positional disorder (Delta S_sys > 0) dominates at higher temperatures where T*Delta S > Delta H.

Hint

No hint available

Question Info

Course: CHM 101
Topic: CHM 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 1839 of 1872
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