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The vapour pressures of A and B at 25°C are 90 mm Hg and 15 mm Hg, respectively. If A and B are mixed such that the mole fraction of A in the mixture is 0.6, then the mole fraction of B in the vapour phase is x × 10-1. The value of x is _________. (Nearest integer)
    Correct answer is '1'. Can you explain this answer?
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    The vapour pressures of A and B at 25°C are 90 mm Hg and 15 mm Hg,...
    °C are 60 mmHg and 90 mmHg, respectively. If a mixture of A and B with mole fraction of A is 0.4 is prepared, what is the total vapor pressure of the mixture at 25°C?

    To find the total vapor pressure of the mixture, we can use Raoult's law, which states that the vapor pressure of a mixture is equal to the sum of the partial pressures of the components in the mixture, each multiplied by its mole fraction:

    P_total = P_A * x_A + P_B * x_B

    where P_A and P_B are the vapor pressures of A and B, respectively, and x_A and x_B are their mole fractions in the mixture.

    Substituting the given values, we get:

    P_total = 60 mmHg * 0.4 + 90 mmHg * 0.6
    P_total = 24 + 54
    P_total = 78 mmHg

    Therefore, the total vapor pressure of the mixture at 25°C is 78 mmHg.
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    The vapour pressures of A and B at 25°C are 90 mm Hg and 15 mm Hg,...
    xA = 0.6
    PT = xAPAo + xBPBo
    = 0.6 × 90 + 0.4 × 15
    = 54 + 6 = 60
    xAPAo = yAPT
    0.6 × 90 = yA(60)
    yA = 0.9
    yB = 0.1 = 1 × 10-1
    ∴ x = 1
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    The vapour pressures of A and B at 25°C are 90 mm Hg and 15 mm Hg, respectively. If A and B are mixed such that the mole fraction of A in the mixture is 0.6, then the mole fraction of B in the vapour phase is x × 10-1. The value of x is _________. (Nearest integer)Correct answer is '1'. Can you explain this answer?
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