Question

State the conditions required for the following reaction to take place:

Any two conditions for the conversion of Sulphur dioxide to Sulphur trioxide.

Answer 1

Conditions required for conversion of Sulphur dioxide to Sulphur trioxide.

1. There must be a catalyst which is Vanadium pentoxide (${\mathrm{V}}_2{\mathrm{O}}_5$)
2. The temperature must be between the range of $450-500°\mathrm{C}$
3. Pressure must be about 1-2 atmosphere.
4. Balanced chemical equation- $\underset{(\mathrm{Sulphur}\mathrm{dioxide})}{2{\mathrm{SO}}_2\left(\mathrm{g}\right)}+\underset{\left(\mathrm{Oxygen}\right)}{{\mathrm{O}}_2\left(\mathrm{g}\right)}\underset{450-500°\mathrm{C}}{\overset{\underset{(\mathrm{Vanadium}\mathrm{pentoxide})}{{\mathrm{V}}_2{\mathrm{O}}_5}}{\rightleftharpoons }}\underset{(\mathrm{Sulphur}\mathrm{trioxide})}{2{\mathrm{SO}}_3\left(\mathrm{g}\right)}+45\mathrm{Kcals}$

Hence, the two conditions are:-

(i) Catalyst Vanadium pentoxide (${\mathrm{V}}_2{\mathrm{O}}_5$) must be present.

(ii) Temperature should be between $450-500°\mathrm{C}$.

$\underset{(\mathrm{Sulphur}\mathrm{dioxide})}{2{\mathrm{SO}}_2\left(\mathrm{g}\right)}+\underset{\left(\mathrm{Oxygen}\right)}{{\mathrm{O}}_2\left(\mathrm{g}\right)}\underset{450-500°\mathrm{C}}{\overset{\underset{(\mathrm{Vanadium}\mathrm{pentoxide})}{{\mathrm{V}}_2{\mathrm{O}}_5}}{\rightleftharpoons }}\underset{(\mathrm{Sulphur}\mathrm{trioxide})}{2{\mathrm{SO}}_3\left(\mathrm{g}\right)}+45\mathrm{Kcals}$