What amount of heat is required to heat a copper piece weighing 120 g from 20 ° C to 800 ° C?

Initial data: m (mass of the heated copper part) = 120 g (0.12 kg); t0 (temperature of the copper part before heating) = 20 ºС; t (final heating temperature) = 800 ºС.

Reference data: C (specific heat capacity of copper) = 400 J / (kg * ºС).

The amount of heat expended for heating a copper part can be calculated by the formula: Q = C * m * (t – t0).

Calculation: Q = 400 * 0.12 * (800 – 20) = 48 * 780 = 37 440 J (37.44 kJ).

Answer: It is necessary to spend 37.44 kJ of heat.