MCQ
For the following reaction in gaseous phase $CO\left( g \right) + \frac{1}{2}{O_2}\left( g \right) \to C{O_2}\left( g \right),{K_p}/{K_c}$ is
- A$(RT)^{1/2}$
- ✓$(RT)^{-1/2}$
- C$(RT)$
- D$(RT)^{-1}$
✓
Answer
Correct option: B.
$(RT)^{-1/2}$
b
For a gaseous phase reaction $K_p$ and $K_c$ are related as
For a gaseous phase reaction $K_p$ and $K_c$ are related as
${K_p} = {K_c}{(RT)^{\Delta {n_g}}}$
For the given reaction,
$CO(g) + \frac{1}{2}{O_2}(g) \to C{O_2}(g)$
$\Delta {n_g} = 1 - (1 + 0.5) = - 0.5\,or\, - \frac{1}{2}$
$\therefore \,{K_p} = {K_c}{(RT)^{ - \frac{1}{2}}}$
$or\,\frac{{{K_p}}}{{{K_c}}} = {(RT)^{ - \frac{1}{2}}}$
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