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On mixing, heptane and octane form an id...

On mixing, heptane and octane form an ideal solution. At `373K` the vapour pressure of the two liquid components (heptane and octane) are `105 kPa` and `45 kPa` respectively. Vapour pressure of the solution obtained by mixing `25.0` of heptane and `35g` of octane will be (molar mass of heptane `= 100 g mol^(-1)` and of octane `= 114 g mol^(-1))`:-

A

75 kPa

B

37.5 kPa

C

150.0 kPa

D

87.5 kPa

Text Solution

Verified by Experts

`P_("solution")=(105(1)+45(1))/2=75` K Pascal
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