Question

A gas mixture comprises of 20% CO2, 50% O2, and 30% N2 has the total pressure 100 Pa at temperature -73^oC, if the temperature is increased to 27^oC, what is the new partial pressure of N2?

(a) 15 Pa

(b) 30 Pa

(c) 45 Pa

(d) 60 Pa

The question was posed to me by my school principal while I was bunking the class.

My question is from Ideal Gas Mixtures and Partial Pressure topic in division Recycle, Bypass, Purge, Ideal Gases and Real Gases of Basic Chemical Engineering

Answer 1

Right option is (c) 45 Pa

Explanation: P1/P2 = T1/T2, => 100/P2 = 200/300, => P2 = 150 Pa, => new partial pressure of N2 = 0.3*150 = 45 Pa.