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### Partial Pressure

Posted: Fri Mar 15, 2019 1:06 pm
At 68. Celsius Kp=9.15×10^-3 for reaction
I2(s)--->I2(g).
What is the equilibrium partial pressure of I2(g) at 68 Celsius.
Do we use I2(s) when calculating?
I thought Kp was equal to PI2(g).

### Re: Partial Pressure

Posted: Fri Mar 15, 2019 2:42 pm
Is the value for Kp given at a different temperature? Maybe use Van't Hoff? Because we don't include solids in our equilibrium constant equations, right?

### Re: Partial Pressure

Posted: Fri Mar 15, 2019 3:07 pm
The equilibrium partial pressure expression should not include solids, as they do not have a partial pressure. In this case, the partial pressure should be equal to the Kp value because there is no other value in this expression.

### Re: Partial Pressure

Posted: Sat Mar 16, 2019 9:57 pm
^ yes solids should not be included

### Re: Partial Pressure

Posted: Sun Mar 17, 2019 5:07 pm
Pure solids and liquids should be excluded from the partial pressure equilibrium constant calculations.