Question

Entropy has an absolute value, and the entropy of all substances which are in complete internal equilibrium is zero at 0 K.

(a) Phase α of a species A transforms into phase β at 55 K and 1 atm. The heat capacities of A in the structures α and β are, respectively,  and .

Calculate the enthalpy and entropy of transformation at 55 K and 1 atm.

(b) Calculate the enthalpy of transformation at 0 K and 1 atm.

Answer 1