Heat and Mass Transfer in Food Processing

Milk flows at mass rate $\dot{m} = 1.0\text{ kg/s}$ through a continuous heater and is heated from $T_1 = 15^\circ\text{C}$ to $T_2 = 65^\circ\text{C}$ ($\Delta T = 50^\circ\text{C}$). Taking milk specific heat $c_p = 3.9\text{ kJ/(kg}\cdot\text{K)}$, the required heat transfer rate $q = \dot{m} c_p \Delta T$ in kW is: