We’re being asked to determine the equilibrium constant at 458 ˚C for this reaction:
H2(g) + I2(g) ⇌ 2 HI(g)
Recall that the equilibrium constant is the ratio of the products and reactants.
We use Kp when dealing with pressure and Kc when dealing with concentration:
Note that solid and liquid compounds are ignored in the equilibrium expression.
An equilibrium mixture of H2, I2 and HI at 458°C contains 1.34 atm of H2, 1.34 atm of I2 and 9.30 atm of HI.
What is the equilibrium constant (Kp) for this reaction?
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