AIPMT PRELIMS2011Physics-Thermodynamics
AIPMT PRELIMS 2011 Physics Entropy MCQ Question
Type: MCQ-numerical-Medium-Class 11
When 1 kg of ice at 0°C melts to water at 0°C, the resulting change in its entropy, taking latent heat of ice to be 80 cal/°C is
A
293 cal/K
B
273 cal/K
C
8 × 10⁴ cal/K
D
80 cal/K
Correct Answer
Option A
Detailed Explanation
The change in entropy ΔS is given by ΔQ/T. Here, ΔQ = 80 × 1000 cal and T = 273 K, so ΔS ≈ 293 cal/K.
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