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Per NCERT §5.6(d), the SECOND LAW of thermodynamics, in entropy form, states which?
AEnergy is conserved
BFor an isolated system, entropy of a spontaneous change always increases (overall ΔS > 0)
CΔU = 0 always
DS = constant
Answer & Solution
Correct answer: B. For an isolated system, entropy of a spontaneous change always increases (overall ΔS > 0)
Per NCERT §5.6(d), second law: ΔS_universe > 0 for any spontaneous process. Explains why exothermic processes are common (heat ↑ disorder of surroundings).
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