Chemistry - Ideal Gas Question with Solution | TestHub

$\begin{array}{cccccc}& {\text{N}}_2& +& 3{\text{H}}_2& ⟶& 2{\text{NH}}_3\\ \text{Initial mole}& 1& & 4& & 0\\ \text{Reacted mole}& 1& & 3& \\ \text{Left mole}& 0& & \mathrm{4-3=1}& & 2\end{array}$

${\mathrm{H}}_2$left = 1 mol

$\mathrm{N}{\mathrm{H}}_3$formed = 2 mol

But$\mathrm{N}{\mathrm{H}}_3\mathrm{ }\left(\mathrm{g}\right)$dissolves in water forming$\mathrm{N}{\mathrm{H}}_4\mathrm{O}\mathrm{H}$. Residual gas is only${\mathrm{H}}_2$which exerts pressure.

Volume$=15-5=10\mathrm{ }\mathrm{L}$(5L occupied by${\mathrm{H}}_2\mathrm{O}$added)

$\therefore \mathrm{p}=\frac{\mathrm{n}}{\mathrm{V}}\mathrm{R}\mathrm{T}=\frac{1\times 0.0821\times 300}{10}\mathrm{ a}\mathrm{t}\mathrm{m}$