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J. W. Hill, R. H. Petrucci, T. W. McCreary, & S. S. Perry General Chemistry 4th edition

Problem 17.45

Estimate the normal boiling of heptane, C7H16, given that at this temperature Hovapn = 31.69 kJ/mol.




Answer:

Use Trouton's Rule:

so Tbp = Hovapn /(87 J/mol•K) = (31690 J/mol)/(87 J/mol•K) = 364 K = 91 oC.