First slide

Thermodynamic processes

Question

If heat Q is added reversibly to a system at temperature T and heat $Q^{1}$ is taken away from it reversibly at temperature $T^{1}$ , then which one of the following is correct.

Moderate

A

$\frac{Q}{T} - \frac{Q^{1}}{T^{1}} = 0$
B

$\frac{Q}{T} - \frac{Q^{1}}{T^{1}} > 0$
C

$\frac{Q}{T} - \frac{Q^{1}}{T^{1}} < 0$
D

$\frac{Q}{T} - \frac{Q^{1}}{T^{1}} = Δ U$

Solution

$\begin{array}{l} Since, Q > Q^{1} \\ \Rightarrow \frac{Q}{T} > \frac{Q^{1}}{T^{1}} \\ \Rightarrow \frac{Q}{T} - \frac{Q^{1}}{T^{1}} > 0 \end{array}$

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