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Thermodynamics — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsThermodynamics1 Mark
Question
Assertion : Thermodynamic process in nature are irreversible.
Reason : Dissipative effects can not be eliminated.
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Answer

(a) In reversible process, there always occurs some loss of energy. This is because energy spent in working against the dissipative force is not recovered back. Someirreversibleprocess occur in nature such as friction where extra work to cancel the effect of friction. Salt dissolves in water but a salt does not separate by itself into pure salt and pure water.

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