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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Definitions:

Narcotics

Drugs derived from opium that are capable of relieving pain.

Opium

A narcotic drug obtained from the poppy plant, used historically for pain relief and recreationally for its euphoric effects, leading to potential addiction.

Relieving Pain

Concerns the methods and techniques used to reduce or alleviate pain, whether through medical, psychological, or alternative therapies.

Central Nervous System

The part of the nervous system consisting of the brain and spinal cord, responsible for processing and sending out signals.