Question

Heating of iodine is a ___________ change.

Answer 1

Physical change

• It is a temporary change and affects only physical properties like shape, size, etc.
• In a physical change, the composition remains the same but the arrangement of molecules changes.
• In a physical change, there is very little to no absorption of energy.
• In the physical change, no new substance is formed.
• Physical changes are easily reversible.
• In the physical change, the original substance can be recovered.

The reason for heating iodine is a physical change.

• When the Iodine is heated, there is the formation of vapours of Iodine.
• In the vapour form, the composition remains the same, and only the rearrangement of molecules is seen.
• Also, the vapour form can be reversed by using physical methods.

Hence, due to the same composition of molecules in vapour form, the heating of iodine is a physical change.