How much heat needs to be spent to heat 400 g of iron from 10C to 500C?

Quantity of heat:
Q = С * m * (tк – tн), Q – consumed amount of heat for heating iron (J), С – specific heat capacity of iron (С = 0.444 kJ / (kg * K) = 0.444 * 10³ J (kg * K) ), m – weight of iron (m = 400 g = 0.4 kg), tc – final temperature of iron (tc = 500 ºС), tн – initial temperature of iron (tн = 10 ºС).
Let’s calculate the required amount of heat:
Q = С * m * (tк – tн) = 0.444 * 10³ * 0.4 * (500 – 10) = 87024 J.
Answer: It is necessary to spend 87024 J of heat.