We are being asked to determine the equilibrium partial pressure of HI.
Reaction: 2 HI(g) ⇌ H2(g) + I2(g)
When dealing with equilibrium:
• Kc → equilibrium units are in molarity
• Kp → equilibrium units in terms of pressure
To calculate for the equilibrium partial pressure, we will use KC.
Kc , like other equilibrium constants, is the ratio of products to reactants.
We derive Kc for the reaction
An equilibrium mixture of H2, I2, and HI at 458 oC contains 0.112 mol H2, 0.112 mol I2, and 0.775 mol HI in a 5.00-L vessel.
What are the equilibrium partial pressure of HI when equilibrium is reestablished following the addition of 0.200 mol of HI?
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