Question

When a substance changes from the solid to liquid state, it is known as_______________.

Answer 1

1. The process in which a solid substance changes into a liquid on heating is called melting.
2. The melting of a solid substance takes place at a fixed temperature.
3. The temperature at which a solid substance melts and changes into a liquid at atmospheric pressure is called the melting point of the substance.
4. For example, the ice melts at a temperature of $0^{0}C$ to form liquid water, so the melting point of ice is $0^{0}C$.

Hence, when a substance changes from the solid to liquid state, it is known as melting.