Vapour Pressure of Liquid Solutions
CHXII02:SOLUTIONS

319484 Benzene and toulene form nearly ideal solutions. At \({\rm{2}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}\), the vapour pressure of benzene is 75 torr and that of toulene is 22 torr. The partial vapour pressure of benzene at \({\rm{2}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}\) for a solution containing 78 g of benzene and 46 g of toulene in torr is

1 50
2 25
3 37.5
4 53.5
CHXII02:SOLUTIONS

319485 Vapour pressure of a solution containing 18 g of glucose and 178.2 g of water at \({\mathrm{100^{\circ} \mathrm{C}}}\) is: (Vapour pressure of pure water at\({\mathrm{100^{\circ} \mathrm{C}=760}}\) torr)

1 76.0 torr
2 752.4 torr
3 7.6 torr
4 3207.6 torr
CHXII02:SOLUTIONS

319486 Mole fraction of the component A in vapour phase is \({{\rm{X}}_{\rm{1}}}\), and the mole fraction of component A in liquid mixture is \({{\rm{X}}_{\rm{2}}}\), then (\({{\rm{P}}_{{{\rm{A}}^{\rm{o}}}}}{\rm{ = }}\) vapour pressure of pure A; \({{\rm{P}}_{{{\rm{B}}^{\rm{o}}}}}{\rm{ = }}\) vapour pressure of pure B), the total pressure of liquid mixture is

1 \({{\rm{P}}_{{{\rm{A}}^{\rm{o}}}}}\left( {{{\rm{X}}_{\rm{2}}}{\rm{/}}{{\rm{X}}_{\rm{1}}}} \right)\)
2 \({{\rm{P}}_{{{\rm{A}}^{\rm{o}}}}}\left( {{{\rm{X}}_{\rm{1}}}{\rm{/}}{{\rm{X}}_{\rm{2}}}} \right)\)
3 \({{\rm{P}}_{{{\rm{B}}^{\rm{o}}}}}\left( {{{\rm{X}}_{\rm{1}}}{\rm{/}}{{\rm{X}}_{\rm{2}}}} \right)\)
4 \({{\rm{P}}_{{{\rm{B}}^{\rm{o}}}}}\left( {{{\rm{X}}_{\rm{2}}}{\rm{/}}{{\rm{X}}_{\rm{1}}}} \right)\)
CHXII02:SOLUTIONS

319487 Two liquids \({\text{X}}\) and \({\text{Y}}\) form an ideal solution. The mixture has a vapour pressure of \(400 \mathrm{~mm}\) at \(300 \mathrm{~K}\) when mixed in the molar ratio of \(1: 1\) and a vapour pressure of \(350 \mathrm{~mm}\) when mixed in the molar ratio of \(1: 2\) at the same temperature. The vapour pressures of the two pure liquids \(\mathrm{X}\) and \({\text{Y}}\) respectively are:

1 \(250 \mathrm{~mm}, 550 \mathrm{~mm}\)
2 \(350 \mathrm{~mm}, 450 \mathrm{~mm}\)
3 \(350 \mathrm{~mm}, 700 \mathrm{~mm}\)
4 \(550 \mathrm{~mm}, 250 \mathrm{~mm}\)
CHXII02:SOLUTIONS

319484 Benzene and toulene form nearly ideal solutions. At \({\rm{2}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}\), the vapour pressure of benzene is 75 torr and that of toulene is 22 torr. The partial vapour pressure of benzene at \({\rm{2}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}\) for a solution containing 78 g of benzene and 46 g of toulene in torr is

1 50
2 25
3 37.5
4 53.5
CHXII02:SOLUTIONS

319485 Vapour pressure of a solution containing 18 g of glucose and 178.2 g of water at \({\mathrm{100^{\circ} \mathrm{C}}}\) is: (Vapour pressure of pure water at\({\mathrm{100^{\circ} \mathrm{C}=760}}\) torr)

1 76.0 torr
2 752.4 torr
3 7.6 torr
4 3207.6 torr
CHXII02:SOLUTIONS

319486 Mole fraction of the component A in vapour phase is \({{\rm{X}}_{\rm{1}}}\), and the mole fraction of component A in liquid mixture is \({{\rm{X}}_{\rm{2}}}\), then (\({{\rm{P}}_{{{\rm{A}}^{\rm{o}}}}}{\rm{ = }}\) vapour pressure of pure A; \({{\rm{P}}_{{{\rm{B}}^{\rm{o}}}}}{\rm{ = }}\) vapour pressure of pure B), the total pressure of liquid mixture is

1 \({{\rm{P}}_{{{\rm{A}}^{\rm{o}}}}}\left( {{{\rm{X}}_{\rm{2}}}{\rm{/}}{{\rm{X}}_{\rm{1}}}} \right)\)
2 \({{\rm{P}}_{{{\rm{A}}^{\rm{o}}}}}\left( {{{\rm{X}}_{\rm{1}}}{\rm{/}}{{\rm{X}}_{\rm{2}}}} \right)\)
3 \({{\rm{P}}_{{{\rm{B}}^{\rm{o}}}}}\left( {{{\rm{X}}_{\rm{1}}}{\rm{/}}{{\rm{X}}_{\rm{2}}}} \right)\)
4 \({{\rm{P}}_{{{\rm{B}}^{\rm{o}}}}}\left( {{{\rm{X}}_{\rm{2}}}{\rm{/}}{{\rm{X}}_{\rm{1}}}} \right)\)
CHXII02:SOLUTIONS

319487 Two liquids \({\text{X}}\) and \({\text{Y}}\) form an ideal solution. The mixture has a vapour pressure of \(400 \mathrm{~mm}\) at \(300 \mathrm{~K}\) when mixed in the molar ratio of \(1: 1\) and a vapour pressure of \(350 \mathrm{~mm}\) when mixed in the molar ratio of \(1: 2\) at the same temperature. The vapour pressures of the two pure liquids \(\mathrm{X}\) and \({\text{Y}}\) respectively are:

1 \(250 \mathrm{~mm}, 550 \mathrm{~mm}\)
2 \(350 \mathrm{~mm}, 450 \mathrm{~mm}\)
3 \(350 \mathrm{~mm}, 700 \mathrm{~mm}\)
4 \(550 \mathrm{~mm}, 250 \mathrm{~mm}\)
CHXII02:SOLUTIONS

319484 Benzene and toulene form nearly ideal solutions. At \({\rm{2}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}\), the vapour pressure of benzene is 75 torr and that of toulene is 22 torr. The partial vapour pressure of benzene at \({\rm{2}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}\) for a solution containing 78 g of benzene and 46 g of toulene in torr is

1 50
2 25
3 37.5
4 53.5
CHXII02:SOLUTIONS

319485 Vapour pressure of a solution containing 18 g of glucose and 178.2 g of water at \({\mathrm{100^{\circ} \mathrm{C}}}\) is: (Vapour pressure of pure water at\({\mathrm{100^{\circ} \mathrm{C}=760}}\) torr)

1 76.0 torr
2 752.4 torr
3 7.6 torr
4 3207.6 torr
CHXII02:SOLUTIONS

319486 Mole fraction of the component A in vapour phase is \({{\rm{X}}_{\rm{1}}}\), and the mole fraction of component A in liquid mixture is \({{\rm{X}}_{\rm{2}}}\), then (\({{\rm{P}}_{{{\rm{A}}^{\rm{o}}}}}{\rm{ = }}\) vapour pressure of pure A; \({{\rm{P}}_{{{\rm{B}}^{\rm{o}}}}}{\rm{ = }}\) vapour pressure of pure B), the total pressure of liquid mixture is

1 \({{\rm{P}}_{{{\rm{A}}^{\rm{o}}}}}\left( {{{\rm{X}}_{\rm{2}}}{\rm{/}}{{\rm{X}}_{\rm{1}}}} \right)\)
2 \({{\rm{P}}_{{{\rm{A}}^{\rm{o}}}}}\left( {{{\rm{X}}_{\rm{1}}}{\rm{/}}{{\rm{X}}_{\rm{2}}}} \right)\)
3 \({{\rm{P}}_{{{\rm{B}}^{\rm{o}}}}}\left( {{{\rm{X}}_{\rm{1}}}{\rm{/}}{{\rm{X}}_{\rm{2}}}} \right)\)
4 \({{\rm{P}}_{{{\rm{B}}^{\rm{o}}}}}\left( {{{\rm{X}}_{\rm{2}}}{\rm{/}}{{\rm{X}}_{\rm{1}}}} \right)\)
CHXII02:SOLUTIONS

319487 Two liquids \({\text{X}}\) and \({\text{Y}}\) form an ideal solution. The mixture has a vapour pressure of \(400 \mathrm{~mm}\) at \(300 \mathrm{~K}\) when mixed in the molar ratio of \(1: 1\) and a vapour pressure of \(350 \mathrm{~mm}\) when mixed in the molar ratio of \(1: 2\) at the same temperature. The vapour pressures of the two pure liquids \(\mathrm{X}\) and \({\text{Y}}\) respectively are:

1 \(250 \mathrm{~mm}, 550 \mathrm{~mm}\)
2 \(350 \mathrm{~mm}, 450 \mathrm{~mm}\)
3 \(350 \mathrm{~mm}, 700 \mathrm{~mm}\)
4 \(550 \mathrm{~mm}, 250 \mathrm{~mm}\)
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CHXII02:SOLUTIONS

319484 Benzene and toulene form nearly ideal solutions. At \({\rm{2}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}\), the vapour pressure of benzene is 75 torr and that of toulene is 22 torr. The partial vapour pressure of benzene at \({\rm{2}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}\) for a solution containing 78 g of benzene and 46 g of toulene in torr is

1 50
2 25
3 37.5
4 53.5
CHXII02:SOLUTIONS

319485 Vapour pressure of a solution containing 18 g of glucose and 178.2 g of water at \({\mathrm{100^{\circ} \mathrm{C}}}\) is: (Vapour pressure of pure water at\({\mathrm{100^{\circ} \mathrm{C}=760}}\) torr)

1 76.0 torr
2 752.4 torr
3 7.6 torr
4 3207.6 torr
CHXII02:SOLUTIONS

319486 Mole fraction of the component A in vapour phase is \({{\rm{X}}_{\rm{1}}}\), and the mole fraction of component A in liquid mixture is \({{\rm{X}}_{\rm{2}}}\), then (\({{\rm{P}}_{{{\rm{A}}^{\rm{o}}}}}{\rm{ = }}\) vapour pressure of pure A; \({{\rm{P}}_{{{\rm{B}}^{\rm{o}}}}}{\rm{ = }}\) vapour pressure of pure B), the total pressure of liquid mixture is

1 \({{\rm{P}}_{{{\rm{A}}^{\rm{o}}}}}\left( {{{\rm{X}}_{\rm{2}}}{\rm{/}}{{\rm{X}}_{\rm{1}}}} \right)\)
2 \({{\rm{P}}_{{{\rm{A}}^{\rm{o}}}}}\left( {{{\rm{X}}_{\rm{1}}}{\rm{/}}{{\rm{X}}_{\rm{2}}}} \right)\)
3 \({{\rm{P}}_{{{\rm{B}}^{\rm{o}}}}}\left( {{{\rm{X}}_{\rm{1}}}{\rm{/}}{{\rm{X}}_{\rm{2}}}} \right)\)
4 \({{\rm{P}}_{{{\rm{B}}^{\rm{o}}}}}\left( {{{\rm{X}}_{\rm{2}}}{\rm{/}}{{\rm{X}}_{\rm{1}}}} \right)\)
CHXII02:SOLUTIONS

319487 Two liquids \({\text{X}}\) and \({\text{Y}}\) form an ideal solution. The mixture has a vapour pressure of \(400 \mathrm{~mm}\) at \(300 \mathrm{~K}\) when mixed in the molar ratio of \(1: 1\) and a vapour pressure of \(350 \mathrm{~mm}\) when mixed in the molar ratio of \(1: 2\) at the same temperature. The vapour pressures of the two pure liquids \(\mathrm{X}\) and \({\text{Y}}\) respectively are:

1 \(250 \mathrm{~mm}, 550 \mathrm{~mm}\)
2 \(350 \mathrm{~mm}, 450 \mathrm{~mm}\)
3 \(350 \mathrm{~mm}, 700 \mathrm{~mm}\)
4 \(550 \mathrm{~mm}, 250 \mathrm{~mm}\)