What happens to melting point of naphthalene when an impurity like camphor is added to it

The melting point of naphthalene increases.

Explanation:

When any impurity is added to a substance, the heat capacity changes to higher capacity because more compound now absorbs heat from the heat source. Hence, increasing the melting temperature of the original substance.

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

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