Chemistry · 2019
JEE Main · 11 January 2019, Shift 1 · Q55
Two blocks of the same metal having same mass and at temperature T_1 and T_2, respectively, are brought in contact with each other and allowed to…
Two blocks of the same metal having same mass and at temperature $\displaystyle \mathrm{T}_1$ and $\displaystyle \mathrm{T}_2$, respectively, are brought in contact with each other and allowed to attain thermal equilibrium at constant pressure. The change in entropy, $\displaystyle \Delta \mathrm{S}$, for this process is :
Official answer
(2)
$\displaystyle C_p \ln \left[\frac{\left(T_1+T_2\right)^2}{4 T_1 T_2}\right]$
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JEE Main 2019 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.