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A binary mixture of oxygen and nitrogen with partial pressures in the ratio 0.21 and 0.79 is contained in a vessel at 300 K. If the total pressure of the mixture is 1 * 10 ^5 N/m^2, find mass fraction of oxygen

(a) 0.133

(b) 0.233

(c) 0.333

(d) 0.433

I got this question during an interview.

My enquiry is from Concentrations, Velocities and Fluxes in chapter Modes and Diffusion of Mass Transfer

1 Answer

0 votes
by (39.8k points)
Right answer is (b) 0.233

To elaborate: 0.269/1.156 = 0.233.

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