Calculate the amount of heat required to heat a cast iron iron weighing 1.5 kg from 200C to 2200C.

The amount of heat for heating a cast iron iron:
Q = C * m * (tк – tн), Q is the amount of heat expended to heat the iron (J), C is the specific heat capacity of cast iron (C = 540 J / (kg * K)), m is the weight of the iron (m = 1 , 5 kg), tк – the final temperature of the iron (tк = 2200 ºС), tн – the initial temperature of the iron (tн = 200 ºС).
Let’s calculate the required amount of heat:
Q = C * m * (tc – tn) = 540 * 1.5 * (2200 – 200) = 1620000 J = 1.62 MJ.
Answer: It is necessary to spend 1.62 MJ of heat