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Listed below are the constants in three activity-coefficient equations: Wilson's, Margules' and van Laar's, for the...

Listed below are the constants in three activity-coefficient equations: Wilson's, Margules' and van Laar's, for the system ethanol-water. In addition, the vapor-liquid equilibria at one pressure are tabulated.

a) Using the Wilson equation and the constants listed below, find the bubble pressure and vapor composition for a mixture of 30 mol% ethanol at 90 C

b) Using the Wilson equation, find the dew pressure and composition for a mixture of 80 mol% ethanol at 110 C

c) Using the Wilson equation, find the bubble temperature and composition for a mixture of 20% ethanol at 3.0 bar

d) Using the Wilson equation, find the dew temperature and composition for a mixture of 40% ethanol at 3.0 bar

Data:

Pc, bar Tc, K ω Vc Zc
Ethanol (1) 63.0 516.2 0.635 167. 0.248
Water (2) 217.6 647.3 0.344 56.0 0.229

Antoine Constants

A B C Range (degrees C)
Ethanol (1) 7.58667 1281.590 193.768 78-203
Water (2) 8.01767

1715.700

 234.268 100-265
Constants A12 A21
Margules' 1.1542 0.7485
Van Laar 1.4729 0.6772
Wilson 437.7515 847.0778

Solutions

Expert Solution

queen_honey_blossom answered 2 years ago
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