A body of Cu at 100∘C is in contact with another body of Cu at 0∘C.There occurs transfer of heat from a hot body to a cold body till both acquires the same temperature. If ΔhS∞ and ΔS∞ are the changes in entropy of hot and cold body, respectively, then

A body of $Cu$ at $100^{\circ} C$ is in contact with another body of $Cu$ at $0^{\circ} C$ .There occurs transfer of heat from a hot body to a cold body till both acquires the same temperature. If $Δ_{h} S^{\infty}$ and $Δ S^{\infty}$ are the changes in entropy of hot and cold body, respectively, then

A
$Δ_{h} S^{\circ} + Δ_{c} S^{\circ} = 0$
B
$Δ_{h} S^{\circ} + Δ_{c} S^{\circ} > 0$
C
$Δ_{h} S^{\circ} + Δ_{c} S^{\circ} < 0$
D
$Δ_{h} S^{\circ} = Δ_{c} S^{\circ}$

Solution:

Process is irreversible, so that,

$Δ_{total} S^{\circ} = Δ_{h} S^{\circ} + Δ_{c} S^{\circ} > 0$ .

Thus, option B is correct.

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