Heat capacity
The heat capacity, or 'thermal mass' of an object, is defined as the Energy in Joules required to raise the temperature of a given object by 1º C. This is the 'specific heat' of the object (a defined physical/chemical property) multiplied by its mass and the change in temperature.
Heat capacity = mass x specific heat x change in temperature
Q = mc ΔT
Q = heat capacity, J
m = mass, g
c = specific heat of object, J/(g-ºC)
ΔT = change in temperature, ºC
ΔT = Tfinal - Tinitial
let value of Tinitial =x, Tfinal=y
