use formula, 1/p = x'A/PoA + x'B/PoB
(DERIRVED USING DALTON'S LAW OF PARTIAL PRESSURES AND ROULT'S LAW).
use this formula only when solution is in vapour state.
3.6 g of H20 and 9.2 g of ethanol are mixed together. The soln. obeys raoult’s law. Calculate the mole fraction of ethanol and water in vapour phase. P0water =400 mm Hg , P0ethanol=450 mm Hg
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2 Answers
°ღ•๓ÑÏ…Î
·2009-07-10 23:50:34
use raoult's law
increse in vapour pressure is directly proportional to moel fraction of solute in solution
aieeee
·2009-07-11 00:09:21