For a liquid the vapour pressure is give...

For a liquid the vapour pressure is given by `log_(10) P = (-400)/(T) + 10` Vapour pressure of the liquid is `10^(x)` mm Hg at 400K. The value of x will be _______

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The correct Answer is:

`log P = (-400)/(T) + 10`
at 400K, log `P = (-400)/(400) + 10 = - 9 rArr P = 10^(-9)`

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When 25 g of a non-volatile solute is dissolved in 100g of water, the vapour pressure is lowered by 2.25 xx 10^(-1)mm . If the vapour pressure of water at 20^(@)C is mm, what is the molecular weight of the solute?

206

302

350

276

increases linearly

decreases linearly

increases exponenyially

decreases exponentially

increases linearly

decreases linearly

increases exponentially

decreases exponentially