Question

A process is carried out for the feed mixture of 95% air and 5% ammonia vapor, the compressor recovered 40% of ammonia, what is the exit pressure of the compressor, if the partial pressure of ammonia vapor is 10 mm Hg?

(a) 225.4 mm Hg

(b) 326.8 mm Hg

(c) 451.2 mm Hg

(d) 593.5 mm Hg

Answer 1

Right choice is (b) 326.8 mm Hg

Easiest explanation: Exit components, ammonia: 0.05*0.6 = 0.03, air: 0.95, => yammonia = 0.03/0.98 = 0.0306, => Total exit pressure = 10/0.0306 = 326.8 mm Hg.