Question

Can you please explain about Gay lussacs law with some examples and questions

Answer 1

Gay Lussac 's Law of Gaseous Volumes: When gases react together to form other gases, and all volumes are measured at the same temperature and pressure, the ratio between the volumes of the reactant gases and the products can be expressed in simple whole numbers.

Examples:

H2 (g) + Cl2(g) --------> 2HCl (g)

1 volume of H2 gas combines with 1 volume of Cl2 gas forms 2 volumes of HCl gas. The ratio by volume of gases is 1:1:2.

So 20 cm3 of hydrogen reacts with 20 cm3 of chlorine ==> 40 cm3 of hydrogen chloride (2 x20)

N2(g) + 3H2(g) ==> 2NH3(g)

1 volume of nitrogen gas reacts with 3 volumes of hydrogen gas to produce 2 volumes of ammonia gas. The ratio by volume of gases is 1:3:2.

So 50 cm3 nitrogen reacts with 150 cm3 hydrogen (3 x 50) ==> 100 cm3 of ammonia (2 x 50)