Chemistry

Problem

At 25 °C three pure liquids—1-propanol (

\mathrm{CH_{3}CH_{2}CH_{2}OH}

), acetone (

\mathrm{CH_{3}COCH_{3}}

), and n-pentane (

\mathrm{CH_{3}(CH_{2})_{3}CH_{3}}

)—are placed in separate, identical open containers. Assuming ideal behavior, which sequence correctly ranks the liquids from lowest to highest equilibrium vapor pressure? a)

n

-pentane < 1-propanol < acetone b) 1-propanol < acetone < n-pentane c) acetone < 1-propanol < n-pentane d)

n

-pentane < acetone < 1-propanol

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