The heat capacity C(T) of a substance is the amount of energy (in joules) required to raise the temperature of 1g by 1°C at temperature T.
The energy required to raise the temperature of 1 gram from T₁ to T₂ is exactly the area under the graph of C(T) over [T₁,T₂].
How much energy is required to raise the temperature of one gram from 50°C to 80°C if C(T)=5+0.4 ?
Energy required= ? joules