a mixture of ethanol and 1-propanol behaves ideally at 36C andis in equalibrium

Question

a mixture of ethanol and 1-propanol behaves ideally at 36C andis in equalibrium with its vapor. If the mole fraction of ethanolin the solution is 0.50, calcualte the mole fraction of the vaporphase at this temperature.(The vapor pressure of pure ethanol and1-propanol at 36C are 108mmHg and 40.0mmHg) What is the mole fraction of ethanol a mixture of ethanol and 1-propanol behaves ideally at 36C andis in equalibrium with its vapor. If the mole fraction of ethanolin the solution is 0.50, calcualte the mole fraction of the vaporphase at this temperature.(The vapor pressure of pure ethanol and1-propanol at 36C are 108mmHg and 40.0mmHg) What is the mole fraction of ethanol

Explanation / Answer

Find the total vapor pressure above the mixture using Raoult'slaw P = pexe + ppxp =(108mmHg)(0.50) + (40mmHg)(0.50) = 74 mmHg yeP = pexeye =(pexe) / P = (108mmHg)(0.50) / (74 mmHg) =0.73

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