A solution is composed of 1.70 mol cycloserine (97 6 torr) and 7 10 mul acetone

Question

A solution is composed of 1.70 mol cycloserine (97 6 torr) and 7 10 mul acetone (229.5 ton) What is the total vapor pressure P_total above this solution? It a third volatile component had been present in this solution the total pressure would be calculated in a similar manner but would Involve three terms rather than two For example As you saw In Pari B the vapor above the cyclohexane-accetone solution Is composed of both vapor and acetone vapor What mole fraction at the vapor above the solution X_cy (vapor), is cyclohexane?

Explanation / Answer

pTotal = 170 torr

ptotal = Xa*P0 + Xb*P0

170 = x*97.6 + (1-x)*229.5

x = 0.45

molefraction of cyclohexane = 0.45

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