. Considering entropy (S) as a thermodynamic parameter the criterion for the spontaneity of any process is

(a) ΔS_system + ΔS_surroundings > 0

(b) ΔS_system - ΔS_surroundings > 0

(c) ΔS_system > 0 only

(d) ΔS_surroundings > 0 only.

Best Answer

Correct Option is : (a)

for spontaneity, entropy should increase

that is ΔS > 0

therefore sum of entropy of system and surrounding should also increase

ΔS_system + ΔS_surroundings > 0

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