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A vessel of volume 0.4 m3 contains 0.45 kg of carbon monoxide and 1 kg of air. The gravimetric analysis of air is to be taken as 23.3% oxygen and 76.7% nitrogen. Take the molar masses of carbon monoxide, oxygen and nitrogen as 28, 32 and 28 kg/Kmol. The total pressure in the vessel is______________ kPa.
Take mixture temperature as 15°C.
    Correct answer is '303.8'. Can you explain this answer?
    Most Upvoted Answer
    A vessel of volume 0.4 m3 contains 0.45 kg of carbon monoxide and 1 k...
    Solution:

    Given,
    Volume of the vessel = 0.4 m³
    Mass of CO = 0.45 kg
    Mass of air = 1 kg
    Gravimetric analysis of air = 23.3% O₂ and 76.7% N₂
    Molar masses:
    MCO = 28 kg/kmol
    MO₂ = 32 kg/kmol
    MN₂ = 28 kg/kmol
    Temperature of the mixture = 15°C

    To find: Total pressure in the vessel

    Let us first find out the moles of each gas present in the mixture.

    Moles of CO (nCO) = Mass of CO / Molar mass of CO
    nCO = 0.45 kg / 28 kg/kmol
    nCO = 0.01607 kmol

    Moles of O₂ (nO₂) = (23.3 / 100) x 1 kg / Molar mass of O₂
    nO₂ = 0.008125 kmol

    Moles of N₂ (nN₂) = (76.7 / 100) x 1 kg / Molar mass of N₂
    nN₂ = 0.02735 kmol

    Total moles of the mixture (nT) = nCO + nO₂ + nN₂
    nT = 0.01607 + 0.008125 + 0.02735
    nT = 0.05155 kmol

    From the ideal gas law, PV = nRT

    Total pressure (P) = nRT / V

    where R is the universal gas constant and is equal to 8.314 kPa.m³/kmol.K.

    To find the temperature in Kelvin, T = 273.15 + 15 = 288.15 K

    Substituting the values, we get,

    P = (0.05155 kmol x 8.314 kPa.m³/kmol.K x 288.15 K) / 0.4 m³
    P = 303.8 kPa

    Therefore, the total pressure in the vessel is 303.8 kPa.
    Free Test
    Community Answer
    A vessel of volume 0.4 m3 contains 0.45 kg of carbon monoxide and 1 k...
    Mass of nitrogen present = 76.7/100 x 1 = 0.767 kg
    We know for any ideal gas
    For a constituent
    The total pressure
    P = Po2 + PN2 + PCo
    P = 303.8 kPa
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    A vessel of volume 0.4 m3 contains 0.45 kg of carbon monoxide and 1 kg of air. The gravimetric analysis of air is to be taken as 23.3% oxygen and 76.7% nitrogen. Take the molar masses of carbon monoxide, oxygen and nitrogen as 28, 32 and 28 kg/Kmol. The total pressure in the vessel is______________ kPa.Take mixture temperature as 15°C.Correct answer is '303.8'. Can you explain this answer?
    Question Description
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