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

question 24

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

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