AIPMT PRELIMS2011Chemistry-Thermodynamics
AIPMT PRELIMS 2011 Chemistry Entropy MCQ Question
Type: MCQ-numerical-Medium-Class 11
If the enthalpy change for the transition of liquid water to steam is 30 kJ mol⁻¹ at 27°C, the entropy change for the process would be
A
100 J mol⁻¹ K⁻¹
B
10 J mol⁻¹ K⁻¹
C
1.0 J mol⁻¹ K⁻¹
D
0.1 J mol⁻¹ K⁻¹
Correct Answer
Option A
Detailed Explanation
ΔS_vap = ΔH_vap / T = 30 kJ/mol / 300K = 100 J mol⁻¹ K⁻¹.
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