2 NO(g) + Cl2(g) ⇌ 2 NOCl(g)
When dealing with equilibrium and Kp:
• Kp → equilibrium units in terms of pressure
• Kp is an equilibrium expression:
Calculate the pressures of NO, Cl 2, and NOCl in an equilibrium mixture produced by the reaction of a starting mixture with 4.0 atm NO and 2.0 atm Cl2. (Hint: KP is small; assume the reverse reaction goes to completion then comes back to equilibrium.)
2NO(g) + Cl2(g) ⇌ 2NOCl(g) K P = 2.5 × 10-3
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