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27 May, 02:28

a student collects a sample of hydrogen gas over water when the atmospheric pressure is 99.4kpa and the temperature is 23.0C what is the pressure of the hydrogen gas?

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  1. 27 May, 02:53
    0
    Given:

    Atmospheric pressure = 99.4 kPa

    Temperature = 23 C

    To determine:

    The pressure of H2 gas collected over water

    Explanation:

    Based on Dalton's Law of partial pressures

    P (total) = P (water) + P (H2)

    PH2 = Ptotal - Pwater

    where: Ptotal = atmospheric pressure = 99.4 kPa

    Pwater = vapor pressure of water at 23 C = 2.81 kPa

    PH2 = 99.4 - 2.81 = 99.59 kPa

    Ans: The pressure of H2 gas is 99.6 kPa
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