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

CHEMISTRY · Single correct · A Level · Chemistry · Bonding · Bonding

Problem

At 25 °C three pure liquids—1-propanol (CH3CH2CH2OH\mathrm{CH_{3}CH_{2}CH_{2}OH}), acetone (CH3COCH3\mathrm{CH_{3}COCH_{3}}), and n-pentane (CH3(CH2)3CH3\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) nn-pentane < 1-propanol < acetone (b) 1-propanol < acetone < n-pentane (c) acetone < 1-propanol < n-pentane (d) nn-pentane < acetone < 1-propanol

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