# Does heat capacity change with mass?

The amount of energy a substance gains or loses is related to the amount it's temperature changes using the equation $Q = m c \Delta T$ where Q is the energy the substance gains, m is the mass of material changing temperature, c is the specific heat capacity of the substance,and $\Delta T$ is the change in temperature.
For example, if we heat 100g of water, which has a specific heat capacity of $4.2 J {g}^{- 1} {K}^{- 1}$, and it's temperature increases from 10 degrees C to 30 degrees C, then the amount energy that has gone into the water is 100 x 4.2 x 20 = 8,400 Joules