Kp

[Medgen]

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Should you include the vapor pressures of aqueous solution when calculating Kp or should you only include the partial pressures of gasses? Thanks!

 

[movax]

Should you include the vapor pressures of aqueous solution when calculating Kp or should you only include the partial pressures of gasses? Thanks!

I think the rules for all the Kx's are the same: drop pure liquids and solids, include all else. If you have both gases + aqueous, I think you can do something like Kc = (PCO2 * [X] ) / [Y]. If everything is a gas then it's homogenous equilibrium I believe.

From this site, which is really handy.

(brain error here: what calculations do you dump elements in their pure form again? Was that enthalpy / heat of formation?)

 

[Cool Beans]

(brain error here: what calculations do you dump elements in their pure form again? Was that enthalpy / heat of formation?)

When you calculate Delta G (rxn) or Delta H (rxn) using enthalpies or free energies of formation.