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Two samples of same substance A and B are at 300 K and 500 K respectively. When A and B are brought in thermal contact in reversible manner, which of the following options are correct?

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$Δ S_{A} > Δ S_{B}$

Can't be determined

$Δ S_{A} < Δ S_{B}$

$| Δ S | < |Δ S_{B}|$

answer is B.

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Detailed Solution

q is same for A and B, but of opposite sign. Entropy of A $↑$ while that of B $↓$ .

$\Rightarrow Δ S_{A} > Δ S_{B}$

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