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At vapour pressures of ethanol and metan...

At vapour pressures of ethanol and metanol are 44.5 mm Hg and 88.7 mm Hg respectively. An ideal solution is formed at the same temperature by mixing 60 g of ethanol with 40 g of methanol. The total vapour pressure of the solution and the mole fraction of methanol in the vapour are respectively.

Text Solution

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The correct Answer is:
`66.11 mm Hg, 0.656`
`P_("total") = X_("ethanol") P_("ethanol")^(@) +X_("methanol") xx P_("methanol")^(@)`
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The vapour pressures of ethanol and methanol are 44.5 and 88.7 mm Hg , respectively. An ideal solution is formed at the same temperature by mixing 60 g of ethanol with 40 g of methanol . Calculate the total vapour pressure of the solution and mole fraction of methanol in the vapour.

The vapour pressure of ethanol and methanol are 44.0 mm and 88.0 mm Hg , respectively. An ideal solution is formed at the same temperature by mixing 60 g of ethanol with 40g of methanol. Calculate the total vapour pressure of the solution and the mole fraction of methanol in the vapour.

Knowledge Check

  • The vapour pressures of ethanol and methanol are 44.5 and 88.7 mm Hg , respectively. An ideal solution is formed at the same temperature by mixing 60 g of ethanol with 40 g of methanol . Calculate the total vapour pressure of the solution and mole fraction of methanol in the vapour.

    A
    43.46 mm and 0.51
    B
    66.15 mm and 0.657
    C
    66.15 mm and 0.791
    D
    70.59 mm and 0.657

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