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For substance A, the entropy of the solid at 98.36 K is 7.36 Cal/molK, at this...

For substance A, the entropy of the solid at 98.36 K is 7.36 Cal/molK, at this temperature it takes place the transition from one solid form to another, the transition heat is 284.3 cal/mol. The increase in entropy of the second solid modification is 98.36 K to 158.91 K and is 5.05 Cal/molK; The temperature of 158.91 K is the melting temperature of the solid. The melting heat of the solid is 476 cal/mol. From the melting point to the boiling point, 188.07 K, the increase of entropy is 2.36 Cal/molK and the heat of vaporization is 3860 cal/mol. A heat capacity from the boiling point to 298 K is 6.98 Cal/molK to an atmosphere of pressure. To calculate the absolute entropy of a considering as ideal gas an atmosphere and 298 K.

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