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Equilibrium constant
Posted: Sun Jan 13, 2019 7:41 pm
by Valeria Viera 1B
How come pressure does not affect Kc? It does affect Kp right?
Re: Equilibrium constant
Posted: Sun Jan 13, 2019 8:26 pm
by Jaira_Murphy_2D
Kc is just referring to calculating the eq of given concentrations and Kp refers to calculating the eq of given pressures.
Re: Equilibrium constant
Posted: Sun Jan 13, 2019 9:59 pm
by Angela Grant 1D
Technically, it affects both since pressure and concentration are related by PV=nRT --> P=(concentration)RT <--> concentration=P/RT
But yes Kp is pressure and Kc is concentration
Re: Equilibrium constant
Posted: Sun Jan 13, 2019 10:00 pm
by 405021651
Kp is dealing with the pressure not essentially the concentration like Kc is
Re: Equilibrium constant
Posted: Sun Jan 13, 2019 10:04 pm
by Celeste 1I
Just as a note Kp can only be used when talking about gases. Not sure if that helps. The partial pressure or concentration can be used depending on which is given.
Re: Equilibrium constant
Posted: Mon Jan 14, 2019 12:04 am
by Yiting_Gong_4L
Kp and Kc both give the equilibrium constant, but Kp is for partial pressure and Kc is for concentration.
Re: Equilibrium constant
Posted: Mon Jan 14, 2019 9:28 am
by Laurence Tacderas 1K
Partial pressures of the reactant and products affect Kp, not Kc. Changing the pressure by reducing the volume can affect both Kp and Kc.