A copper rivet with a mass of 50 g must be heated from 20 ° C to 370 ° C. How much heat is needed for this?

Problem data: m (the mass of the copper rivet taken) = 50 g (in the SI system m = 0.05 kg); t0 (initial rivet temperature) = 20 ºС; t (final temperature) = 370 ºС.

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

The required heat for heating the taken copper rivet is calculated by the formula: Q = Cm * m * (t – t0).

Let’s calculate: Q = 400 * 0.05 * (370 – 20) = 7 * 10 ^ 3 J (7 kJ).

Answer: To heat a copper rivet, you need 7 kJ of heat.