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Question

For A(g) + 3B(g) <=> 2C(g) , Kp = 0.125 at 600 K. If PA = 1 atm , PB = 2 atm initially, what is PC at equilibrium?

Options

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Explanation

Let PC = 2x , PA = 1 - x , PB = 2 - 3x . Kp = ((PC)²/PA (PB)³) = ((2x)²/(1 - x)(2 - 3x)³) = 0.125 , 4x² = 0.125 (1 - x)(2 - 3x)³ , x ≈ 0.25 , PC = 0.5 atm .