a
$\Rightarrow \triangle \omega=\triangle Q-\triangle U$
$\Delta Q=C_{P}^{n} \Delta T$
$\Delta U= C_{v}^{n} \Delta T$
$\Delta \omega=n\left(C_{P}-C_{N}\right) \Delta T$
$\triangle Q: \triangle \omega$
$\frac{C_{P}}{C_{V}}=\gamma,=\frac{C_{P}}{C_{P}-C_{V}}$
$=\frac{C_{P} / C_{V}}{C_{P} / C_{V}-1}=\frac{\gamma}{\gamma-1}$
