The Vapor Pressure of Pure Water at 15 ^$\circ$ C Is 12

question 63

Multiple Choice

The vapor pressure of pure water at 15 ^$\circ$ C is 12.8 mm Hg.What is the equilibrium vapor pressure of water above a mixture of 72.0 g ethanol (CH₃CH₂OH,molar mass = 46.07 g/mol) and 22.0 g water?

• A) 2.84 mm Hg
• B) 5.61 mm Hg
• C) 7.19 mm Hg
• D) 10.0 mm Hg
• E) 12.8 mm Hg

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Definitions:

Repression

A defense mechanism where distressing thoughts and feelings are unconsciously blocked from conscious awareness.

Pervasive

Having the tendency to spread widely throughout an area or group of people.

Latency Period

A phase in psychosexual development, occurring from about age 6 to puberty, characterized by a decrease in sexual interests and activities.

Psychosexual Stages

Psychosexual Stages is a Freudian theory describing how personality development occurs in five stages (oral, anal, phallic, latency, and genital) associated with erogenous zones.