Question

Give 2 evidences for molecular motion of gases with explanation

Answer 1

1.) Smoke cell — > We observe that the smoke particles are moving randomly.

This is because they collide with the invisible air molecules which are in random motion.

2.) Diffusion of Ammonia and HCl gas — > we soak a piece of cotton wool in HCl and another in Ammonia solution and place the two cotton wools at two different ends.

From each cotton wool, the vapour of the two chemicals evaporate and move as per the movement of air particles.

The particles of each vapour moves randomly.

Ammonia with lower molar mass moves faster than HCl gas hence a white precipitate of Ammonium Chloride is formed near the cotton wool soaked in HCl.

These experiments show evidence of molecular motion of gases..

Answer 2

Answer:

Explanation:

1.) Smoke cell — > We observe that the smoke particles are moving randomly.

This is because they collide with the invisible air molecules which are in random motion.

2.) Diffusion of Ammonia and HCl gas — > we soak a piece of cotton wool in HCl and another in Ammonia solution and place the two cotton wools at two different ends.

From each cotton wool, the vapour of the two chemicals evaporate and move as per the movement of air particles.

The particles of each vapour moves randomly.

Ammonia with lower molar mass moves faster than HCl gas hence a white precipitate of Ammonium Chloride is formed near the cotton wool soaked in HCl.

These experiments show evidence of molecular motion of gases..