We know, the amount of heat required to increase the temperature of a body through 1K is called its heat capacity. Again if the specific heat of the material of a body is S, then S joule heat is required to raise the temperature of the body through 1K.
Therefore, to increase the temperature through 1K of a body with a mass of 1kg the amount of heat required = S Joule
To increase the temperature through 1K of a body with a mass of m kg the amount of heat required = mS joule
It is the heat capacity of the body with a mass of m kg.
:. Heat capacity, C = mS joule
or, Heat capacity = mass x specific heat
Specific heat = Heat Capacity/mass
It is the relation between heat capacity and specific heat.