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The entropy versus temperature plot for phases \(\alpha\) and \(\beta\) at 1 bar pressure is given. \(S_T\) and \(S_0\) are entropies of the phases at temperatures \(T\) and \(0K\), respectively.
The transition temperature for \(\alpha\) to \(\beta\) phase change is \(600 K\) and \(C_P\), \(β − C_P\), \(\alpha = 1 \text{ J }mol^{−1} K^{-1}\). Assume \((C_P,\beta − C_P,\alpha)\) is independent of temperature in the range of \(200\) to \(700 K\). \(C_P,\alpha \text{ and }C_P,\beta\) are heat capacities of \(\alpha\) and \(\beta\) phases, respectively
The transition temperature for \(\alpha\) to \(\beta\) phase change is \(600 K\) and \(C_P\), \(β − C_P\), \(\alpha = 1 \text{ J }mol^{−1} K^{-1}\). Assume \((C_P,\beta − C_P,\alpha)\) is independent of temperature in the range of \(200\) to \(700 K\). \(C_P,\alpha \text{ and }C_P,\beta\) are heat capacities of \(\alpha\) and \(\beta\) phases, respectively
Question: 1
The value of enthalpy change, Hβ − Hα (in J mol−1), at 300 K is ___.
The value of enthalpy change, Hβ − Hα (in J mol−1), at 300 K is ___.
Updated On: May 24, 2024
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Correct Answer: 300
Solution and Explanation
The enthalpy change (Hβ−Hα) at 300 K is __ J mol−1−1.
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Question: 2
The value of entropy change, Sβ − Sα (in J mol−1 K−1), at 300 K is ___.
[Use: ln 2 = 0.69 ,Given: Sβ − Sα = 0 at 0 K]
The value of entropy change, Sβ − Sα (in J mol−1 K−1), at 300 K is ___.
[Use: ln 2 = 0.69 ,Given: Sβ − Sα = 0 at 0 K]
[Use: ln 2 = 0.69 ,Given: Sβ − Sα = 0 at 0 K]
Updated On: May 24, 2024
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Correct Answer: 0.31
Solution and Explanation
The correct answer is 0.31
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