Translations:Thermodynamic and Mechanical Study/461/en

${\dot{P}}_{𝒞}=\frac{(\gamma -1)({\dot{Q}}_{𝒞}+{\dot{H}}_{𝒞}^{\mathrm{e}\mathrm{x}\mathrm{t}})-\gamma P_{𝒞}{\dot{V}}_{𝒞}}{V_{𝒞}}.$