Use the following data to estimate, S[C 6 H 6 (g, 1 atm)] at 298.15 K. For

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Use the following data to estimate, S°[C6H6(g, 1 atm)] at 298.15 K. For C6H6(s, 1 atm) at its melting point of 5.53 °C, S° is 128.82 J mol-1 K-1. The enthalpy of fusion is 9.866 kJ mol-1. From the melting point to 298.15 K, the average heat capacity of liquid benzene is 134.0 J mol-1 K-1. The enthalpy of vaporization of C6H6(l) at 298.15 K is 33.85 kJ mol-1, and in the vaporization, C6H6(g) is produced at a pressure of 95.13 Torr. Imagine that this vapor could be compressed to 1 atm pressure without condensing and while behaving as an ideal gas. Refer to the preceding exercise, and note the following: For infinitesimal quantities, dS = δq/dT; for the isothermal compression of an ideal gas, δq = -dw; and for pressure–volume work, δw = -P dV.

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General Chemistry Principles And Modern Applications

ISBN: 9780132931281

11th Edition

Authors: Ralph Petrucci, Jeffry Madura, F. Herring, Carey Bissonnette

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