Question

Calculate the heat capacity of Hf at 200 K, given that its Debye temperature is 

242 K.

Answer 1

$$C_V=\frac{12\pi^4}{5}R\left(\frac{T}{T_D}\right)^3\\C_V=\frac{12\pi^4}{5}8.31\left(\frac{200}{242}\right)^3=1097\frac{J}{molK}$$