Ответ:

V[tex]V_{1}=\frac{m_{1}}{M_{1}}\frac{RT_{1}}{p_{1}};

V_{2}=\frac{0.8m_{1}}{M_{1}}\frac{5R2T_{1}}{p_{1}};

\frac{V_{2}}{V_{1}}=8[/tex]