Question

Pure $S{O}_3\left(g\right)$ is heated in a solid vessel to create the following equilibrium:
$2S{O}_3\left(g\right)\rightleftharpoons 2S{O}_2\left(g\right)+O_2\left(g\right)$
The vapour density of the equilibrium mixture is:

• A. $16$
• B. $26$
• C. $36$
• D. $46$

Answer 1

The correct option is C $36$

$\begin{array}{c}2S{O}_3⟹2S{O}_2+O_2\\ \frac{D}{d}=1+(n-1)\alpha n=\frac{3}{2},D=\frac{MM}{2}\\ \frac{40}{d}=1+(\frac{3}{2}-1)\times \frac{1}{2}\alpha =\frac{1}{2}\\ =\frac{80}{2}=40\end{array}$

$d=36$

Correct answer $-C$