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The entropy versus temperature plot for phases α and β at 1 bar pressure is given. ST and So 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 Cp,β - Cp,α = 1 J mol-1 K-1. Assume Cp,β - Cp,α is independent of temperature in the range of 200 to 700 K.  Cp,α and Cp,β are heat capacities of α and β phases, respectively. 
The value of entropy change, \(S _\beta- S _\alpha\) (in \(J mol ^{-1} K ^{-1}\) ), at \(300 K\) is-------------[Use: \(\ln 2=0.69\)Given : \(S _\beta- S _a=0\) at \(0 K\) ] 📲PW App Link - https://bit.ly/YTAI_PWAP 🌐PW Website - https://www.pw.live