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Per NCERT eqn 5.19, for a SPONTANEOUS process the TOTAL entropy change (system + surroundings) obeys which inequality?
AΔS_total = 0 always
BΔS_total < 0
CΔS_total = ΔH
DΔS_total = ΔS_sys + ΔS_surr > 0
Answer & Solution
Correct answer: D. ΔS_total = ΔS_sys + ΔS_surr > 0
Per NCERT eqn 5.19, ΔS_total > 0 for spontaneity. At equilibrium ΔS = 0. This is the second law in entropy form.
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