A piece of iron is heated till it becomes red-hot. It then becomes soft and is beaten to the desired shape. What kind of changes are observed in this process-reversible or irreversible?
The changes during this process are reversible in nature.
A piece of iron when heated, becomes red -hot and soft. There is change only in its physical state, from solid and hard, to flexible and soft. Then, it is beaten to desired shape, in which again, there is change only in its physical form or shape. This piece of iron can be re -heated and molded back to its original shape.
Thus, the changes are reversible.