Define the term specific heat capacity and state it's S.I. unit.

The specific heat capacity of a substance is the amount of heat energy required to raise the temperature of unit mass of that substance through 1°C (or 1 K). i.e.,

$\text{Specific heat capacity c} = \dfrac{\text{Amt of heat energy supplied}}{\text{mass} \times \text{rise in temperature}}$

The S.I. unit of specific heat capacity is joule per kilogram per kelvin (J kg^-1 K^-1).