chemistry

Methanol, CH3OH, a colorless, volatile liquid, was formerly known as wood alcohol. It boils at 65.0°C and has a heat of vaporization of 37.4 kJ/mol. What is its vapor pressure at 22.0°C?

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  1. Use the Clausius-Clapeyron equation.
    p1 = 760 mm
    T1 = 65.0 + 273.15

    P2 = unknown
    T2 = 22.0 + 273.15
    delta Hvap = 37400 J/mol

    REMEMBER: The vapor pressure of a liquid at its boiling point is ALWAYS atmospheric pressure and standard pressure is 760 mm.

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  2. 109 mmHg

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