The experimentally measured vapor pressure of SO2 at -25 degrees C is 49.5 kPa and at 0 degrees C is 155 kPa.?

Determine the enthalpy of vaporization, ΔHvap, at 100 degrees C.

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  • Dr W
    Lv 7
    2 months ago

    via the clausius clapeyron equation

    .. ln(P1 / P2) = (-dHvap/R) * (1/T1 - 1/T2)

    you know.. 

    .. P1 = 49.5 kPa

    .. P2 = 155 kPa

    .. R = 8.314 J/molK

    .. T1 = -25 + 273.15 = ___ K

    .. T2 = 0 + 273.15 = 273.15K

    so calculate dHvap over that range

    **********

    without more information, like

    .. what class is this for

    .. what have you been studying

    .. etc

    I'd probably assume that dHvap is constant over the range - 25°C to 100°C

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