Practice question
Question
For A(g) + B(g) <=> 2C(g) , Kp = 1 at 300 K. If the total pressure at equilibrium is 3 atm and PA = 1 atm , what is PC ?
Explanation
Total pressure = PA + PB + PC = 3 , PB + PC = 2 , Kp = ((PC)²/PA PB) = ((PC)²/1 · (2 - PC)) = 1 , PC² = 2 - PC , PC ≈ 1.414 atm .