AIPMT PRELIMS2012Chemistry-Thermodynamics
AIPMT PRELIMS 2012 Chemistry Entropy and Enthalpy MCQ Question
Type: MCQ-numerical-Medium-Class 11
The enthalpy of fusion of water is 1.435 kcal/mol. The molar entropy change for the melting of ice at 0°C
A
0.526 cal/(mol K)
B
10.52 cal/(mol K)
C
21.04 cal/(mol K)
D
5.260 cal/(mol K)
Correct Answer
Option D
Detailed Explanation
The molar entropy change (ΔS) is calculated using the formula ΔS = ΔH/T. Here, ΔH = 1.435 kcal/mol = 1435 cal/mol and T = 273 K. Thus, ΔS = 1435/273 = 5.256 cal/(mol K).
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