Chemistry - Ideal Gas Question with Solution | TestHub

If$\frac{3^{\mathrm{t}\mathrm{h}}}{8}$of the air is expelled out then remaining air$=\frac{5}{8}$

In the open vessel volume and pressure are both constant but moles are decreasing

$\therefore {\text{ n}}_{\text{1}}{\text{T}}_{\text{1}}\text{=}{\text{n}}_{\text{2}}{\text{T}}_{\text{2}}$

$\therefore {\text{ n}}_{\text{1}}\text{×}\text{300}\text{=}\left(\frac{\text{5}}{\text{8}}{\text{n}}_{\text{1}}\right){\text{T}}_{\text{2}}$

$\therefore {\text{T}}_{\text{2}}\text{=}\frac{\text{8}}{\text{5}}\text{×}{\text{T}}_{\text{1}}\text{=}\frac{\text{8}}{\text{5}}\text{×}\text{300}\text{=}\text{480}\text{K}$

$=480-273={\text{207}}^{\text{o}}\text{C}$