Solution to task 664 from Chertov´s for extramural stud

Solution to task 664 from Chertov´s for extramural stud

664. A copper sample with a mass of m = 100 g is at a temperature of T1 = 10 K. Determine the heat Q required to heat the sample to a temperature of T2 = 20 K. You can take the characteristic temperature медиD for copper equal to 300 K, and the condition T << ΘD consider fulfilled.