# How does Avogadro's Law apply to the reduction of ethylene and acetylene?

Aug 3, 2017

For the complete hydrogenation of ethylene or acetylene..........?

#### Explanation:

${H}_{2} C = C {H}_{2} + {H}_{2} \rightarrow {H}_{3} C - C {H}_{3}$

${H}_{2} C \equiv C {H}_{2} + 2 {H}_{2} \rightarrow {H}_{3} C - C {H}_{3}$

Given Avogadro's law, equal volumes of gases contain equal numbers of molecules under the same temperature and pressure, i.e. $V \propto n$.

And so for the hydrogenation of ethylene we need a $0.25 \cdot {\mathrm{dm}}^{3}$ volume of dihydrogen, and for the hydrogenation of acetylene, we need a $0.50 \cdot {\mathrm{dm}}^{3}$ volume of dihydrogen.