A gas mixture with 20% Neon with pressure 3 atm at 27oC is entered a reactor with rate F, and another stream with pure Neon with 2 atm pressure at 27oC entered the reactor with rate 5 liter/s, product has 40% Neon with same conditions with rate P, what is the value of F?

Correct Answer: 30 liter/s
Neon balance- 0.2*F*3 + 5*2*1 = 0.4*P*2, => 0.6F + 10 = 0.8P, Overall balance- F + 5 = P, => F = 30 liter/s.