Homework Answers
we can do this via molar fractions
so..
mol of ethanol = mass/MW
and mass = D*V so
mol = D*V/MW = (0.789*32)/(46) = 0.5488
for
water:
mol = D*V/MW = (0.998*68)/(18) = 3.770
now...
total mol = 0.5488+3.770 = 4.3188
Pvapor mix = x1*P1° + x2*P°2 = (3.770)/4.3188*17.5 + 0.5488/4.3188*43.9
Pvapor mix = 20.85 torr
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