Acetone is a common solvent. (See Study Question 8 for the structure of acetone.)
(a) Allyl alcohol, CH₂=CH—CH₂OH, is an isomer of acetone. Acetone has a vapor pressure of 100 mm Hg at +7.7°C. Predict whether the vapor pressure of allyl alcohol is higher or lower than 100 mm Hg at this temperature? Explain.
(b) Use the Clausius–Clapeyron equation to calculate the enthalpy of vaporization of acetone from the following data.

(c) Fluorination of acetone, C₃H₆O (substitution of fluorine for H) produces a gaseous compound with the formula C₃H₆−xF_xO. To identify this compound its molar mass was determined by measuring the gas density. The following data were obtained: Mass of gas, 1.53 g; volume of flask = 264 mL; pressure exerted by gas, 722 mm Hg; temperature, 22°C. Calculate the molar mass from this information, then identify the molecular formula.

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Temperature (°C) Vapor Pressure (mm Hg) -9.4 40. +7.7 100. 39.5 400. 56.5 760.