Question
The entropy versus temperature plot for phases α and β at 1 bar pressure is given. S T and S 0 are entropies of the phases at temperatures T and 0   K , respectively. The transition temperature for α to β phase change is 600   K and C p , β - C p , α = 1   J   mol - 1   K - 1 . Assume C p , β - C p , α is independent of temperature in the range of 200 to 700   K . C p , α and C p , β are heat capacities of α and β phases, respectively. The value of enthalpy change, H β - H α (in Jmol - 1 ), at 300   K is