STANDARD Physics Entropy MCQ Question
The entropy change can be calculated by using the expression, ΔS = -q_rev/T. When water freezes in a glass beaker, choose the correct statement amongst the following.
S_system decreases but ΔS_surroundings remains the same
S_system increases but ΔS_surroundings decreases
S_system decreases but ΔS_surroundings increases
S_system decreases and ΔS_surroundings also decreases
Correct Answer
Detailed Explanation
As water freezes from liquid to solid, randomness decreases, i.e., ΔS_system decreases. Heat released during the process is absorbed by the surroundings hence, ΔS_surroundings increases.
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