Two bodies of specific heats S₁ and S₂ having same heat capacities are combined to form a single composite body. Specific heat of composite body is -
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Question

Two bodies of specific heats S₁ and S₂ having same heat capacities are combined to form a single composite body. Specific heat of composite body is -

G1 Physics · Accepted Answer

Apply energy conservation. Sensible heat is Q=mcΔT and phase-change heat is Q=mL. Heat lost by hotter parts equals heat gained by colder parts. Evaluating the given data/statements gives C: 2S₁S₂/(S₁+S₂). Therefore the correct answer is C.