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| $A$. समदाबी (Isobaric) | $I$. $\Delta Q = \Delta W$ |
| $B$. समआयतनिक (Isochoric) | $II$. $\Delta Q = \Delta U$ |
| $C$. रुद्धोष्म (Adiabatic) | $III$. $\Delta Q = 0$ |
| $D$. समतापीय (Isothermal) | $IV$. $\Delta Q = \Delta U + P \Delta V$ |
| स्तंभ-$I$ | स्तंभ-$II$ |
|---|---|
| $(a)$ हीट इंजन | $(i)$ $\text{COP} = \frac{Q_2}{Q_1 - Q_2}$ |
| $(b)$ हीट पंप | $(ii)$ $\eta = \frac{Q_1 - Q_2}{Q_1}$ |
| $(iii)$ $\eta = \frac{T_1 - T_2}{T_1}$ |
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