What amount of heat is given off by copper weighing 5 kg when it cools from 715 to 15 C?

Given: m (mass of cooled copper) = 5 kg; t1 (copper temperature before cooling) = 715 ºС; t2 (end temperature) = 15 ° C.

Constants: Cm (specific heat of copper) = 400 J / (kg * K).

The heat that copper will give up during cooling is calculated by the formula: Q = Cm * m * (t1 – t2).

Let’s calculate: Q = 400 * 5 * (715 – 15) = 400 * 5 * 700 = 1.4 * 10 ^ 6 J (1.4 MJ).

Answer: When cooled, the taken copper will give up 1.4 MJ of heat.