Assuming the validity of the De Priester charts, make the following VLE calculations for the methane(1)/cthylenc(2)/elhand(3) system:

Question:

Assuming the validity of the De Priester charts, make the following VLE calculations for the methane(1)/cthylenc(2)/elhand(3) system:
(a) BVBL P. given x1 = 0.10. x2 = 0.50, and t = -60(°F).
(b) DEW P, given y1 = 0.50, y2 = 0.25, and r = -60(°F).
(c) BUBL T, given x1 = 0.12, x2 = 0.40. and P = 250(psia),
(d) DEW T, given y1 = 0.43. y2 = 0,36, and P = 250(psia).