Gasoline Is Primarily a Mixture of Hydrocarbons and Is Sold $\degree$

Multiple Choice

Gasoline is primarily a mixture of hydrocarbons and is sold with an octane rating that is based on a comparison with the properties of isooctane (C₈H₁₈) , which has an enthalpy of vaporization of 35.8 kJ/mol and a normal boiling point of 98.2 $\degree$ C.Determine the vapor pressure of isooctane on a very hot day when the temperature is 38.0 $\degree$ C.

A) 80.6 torr
B) 36.7 torr
C) 67.8 torr
D) 47.9 torr
E) 89.3 torr