What amount of heat is needed to melt a copper billet weighing 1 gram, taken at a temperature of 1075 degrees?

Initial data: m (mass of a copper billet) = 1 g (10 ^ -3 kg); t (temperature at which the copper billet was located) = 1075 ºС (hence, the copper billet was at the melting temperature).

Reference data: λ (specific heat of fusion of copper) = 2.1 * 10 ^ 5 J / kg.

The required amount of heat for melting a copper billet is calculated by the formula: Q = λ * m.

Let’s perform the calculation: Q = 2.1 * 10 ^ 5 * 10 ^ -3 = 210 J.

Answer: To melt a copper billet weighing 1 gram, 210 J of heat is required.