According to Debye's law, the molar heat capacity at constant volume of a diamond varies with the temperature as follows:
cv=3R (4Π4/5) (T/?)3.
What is the entropy change in units of R of a diamond of 1.2 g mass when it is heated at constant volume from 10 to 350 K? The molar mass of diamond is 12 g, and Θ is 2230K.