Determine the amount of heat required to heat a copper body weighing 50 kg from 20 degrees to 50.

Task data: m (mass of the heated copper body) = 50 kg; t0 (initial temperature) = 20 ºС; t (final temperature of the copper body) = 50 ºС.

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

The consumed thermal energy for heating the taken copper body is calculated by the formula: Q = Cm * m * (t – t0).

Let’s calculate: Q = 400 * 50 * (50 – 20) = 600 * 10 ^ 3 J (600 kJ).

Answer: 600 kJ of heat is needed to heat a copper body.