Two blocks of the same metal having same mass and at temperature \(...
0Two blocks of the same metal having same mass and at temperature \( T_{1} \) and \( T_{2} \) respectively, are brought in contact
P with each other and allowed to attain thermal equilibrium
W. at constant pressure. The change in entropy, \( \Delta \mathrm{S} \), for this process is :
[JEE Main - 2019 (January)]
(a) \( \mathrm{C}_{\mathrm{p}} \ln \left[\frac{\left(\mathrm{T}_{1}+\mathrm{T}_{2}\right)^{2}}{4 \mathrm{~T}_{1} \mathrm{~T}_{2}}\right] \)
(b) \( 2 \mathrm{C}_{\mathrm{p}} \ln \left[\frac{\left(\mathrm{T}_{1}+\mathrm{T}_{2}\right)^{1 / 2}}{\mathrm{~T}_{1} \mathrm{~T}_{2}}\right] \)
(c) \( 2 \mathrm{C}_{\mathrm{p}} \ln \left[\frac{\left(\mathrm{T}_{1}+\mathrm{T}_{2}\right)}{4 \mathrm{~T}_{1} \mathrm{~T}_{2}}\right] \)
(d) \( 2 \mathrm{C}_{\mathrm{p}} \ln \left[\frac{\left(\mathrm{T}_{1}+\mathrm{T}_{2}\right)}{2 \mathrm{~T}_{1} \mathrm{~T}_{2}}\right] \)
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