Step-by-step explanation:
Q = mc∆T
Known and Unknown
Q = heat energy = ? kJ
m = mass = 10 kg
c = specific heat capacity of water = 4.2 kJ/kg•K = 4.2 kJ/kg•°C
∆T = change in temperature = 50 °C
Solve for Q.
Q = 10 kg × 4.2 kJ/kg•°C × 50 °C = 2100 kJ = 2000 kJ