Gce Model Questions Vol1 2018 Chemistry Question 18
Practice objective / multiple choice question 18 from the 2018 Gce Model Questions Vol1 Chemistry examination.
A solution at 78 °C contains 40.0 g of ethanol (\( \mathrm{C_2H_5OH} \), \(M = 46.07\) g mol\(^{-1}\)) and 60.0 g of water (\(M = 18.02\) g mol\(^{-1}\)). The vapour pressures of pure ethanol and pure water at this temperature are 0.40 atm and 0.30 atm respectively. Assuming the solution behaves ideally, calculate (a) the mole fraction of ethanol in the liquid, (b) the total vapour pressure above the solution, and (c) the mole fraction of ethanol in the vapour phase.
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About This Question
This is Gce Model Questions Vol1 2018 Chemistry Question 18. It is one of the objective questions from the 2018 Gce Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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