Question

Stretching of a rubber band and inflating a balloon is a reversible change. Give reason.

Answer 1

• During stretching of the rubber band, only the size of the rubber band changes. The rubber band comes back to its original shape and size, once it is released. This is a reversible change.
• Similarly, when air is blown into a balloon, its shape and size change and the balloon gets inflated.
• Now when the air filled in the balloon is allowed to escape, the balloon comes back to its original size and shape. Hence, inflating a balloon is a reversible change.