Question

Define diffusion . explain its bromine vapour activity

Answer 1

Diffusion is the random movement of one liquid or gas through another, liquid or gas from a region of its higher concentration to a region of its lower concentration


Diffusion of bromine vapour.

Bromine is a red-brown liquid that boils at 58 °C. Bromine gas is also red-brown and can be seen inside a gas jar.
If bromine gas is allowed to enter a gas jar containing a vacuum, the red-brown colour instantly fills the jar because there are no air molecules to collide with. This shows that the bromine molecules are moving very fast

When bromine is added to a gas jar filled with air or vapour , the red-brown gas is seen to slowly diffuse through the air. The many collisions between the bromine molecules and the air molecules slow down the rate at which the red-brown bromine gas fills the jar.