Practice question
Question
For A₂(g) + B₂(g) <=> 2AB(g) , Kp = 9 at 600 K. If initial pressures are PA₂ = 1 atm , PB₂ = 1 atm , what is PAB at equilibrium?
Explanation
Let 2x be PAB , PA₂ = 1 - x , PB₂ = 1 - x , total pressure = (1 - x) + (1 - x) + 2x = 2 . Kp = ((PAB)²/PA₂ PB₂) = ((2x)²/(1 - x)²) = 9 , (4x²/(1 - x)²) = 9 , (2x/1 - x) = 3 , 2x = 3 - 3x , 5x = 3 , x = 0.6 , PAB = 2 × 0.6 = 1.2 atm .
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