Question

Define Gay Lusaac’s law of combining volumes of gases. Explain it with an example.

Answer 1

Gay-Lussac’s law of combining volumes of gases: Whenever gases react, they do so in volumes which bears a simple ratio to one another and to the volumes of the gaseous products provided all the volumes are measured under the same conditions of temperature and pressure.

N₂ + 3H₂ $\to$ 2NH₃

1 volume 3 volume 2 volume

$N_2$(gas):$H_2$(g) :$N{H}_3$(g) = 1:3:2 which is a simple ratio.