Question

What is the fraction of a gas in a system at partial pressure 2 mm Hg, if the 0.2 fraction of the same gas is at partial pressure 8 mm Hg and 0.3 fraction at partial pressure 18 mm Hg (Use Freundlich Isotherm)?

(a) 0.0125

(b) 0.0250

(c) 0.0375

(d) 0.0450

Answer 1

The correct answer is (a) 0.0125

For explanation: y1/y2 = (p1/p2)^n, => 0.2/0.3 = (8/18)^n => n = 2, => 0.2 = k*8^2 = k = 0.2/64, => y = 0.2/64*2^2 = 0.0125.