Kp?
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Kp?
I understand that you solve for Kp the same way you would solve for Kc, but does partial pressure only apply to gases?
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Re: Kp?
Partial pressure is not typically used for the other phases.
Last edited by Nathan Tong 3G on Sun Jan 17, 2021 9:24 pm, edited 1 time in total.
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Re: Kp?
Yes, this is because ideal gasses assume that they do not interact with each other as their collisions are considered negligible. Hence, their partial pressures are calculated which is equal to their "concentration". Additionally, the units for Kp do not matter as they will cancel out if the equation is set up correctly.
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Re: Kp?
Yes, as partial pressure can only be measured for gases. With Kc, you are looking at the concentrations of substances, in which case you would omit solids and liquids.
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Re: Kp?
yes, partial pressure applies to gases while molar concentrations applies to aqueous compounds
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Re: Kp?
Yep, only for gases because remember that solids and liquids cannot have partial pressures. Therefore, partial pressures only apply to gases.
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Re: Kp?
yes, Kp would only apply to gasses. Also remember that Kc does not apply to pure liquids or solids.
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Re: Kp?
Yes, partial pressure only applies to gases, and when you set up your Kp expression, you use parentheses instead of brackets which are used for concentration. It shouldn't be a big deal however if you use brackets or parenthesis because it will not make a difference in your answer.
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Re: Kp?
Partial pressure only applies to gases, so youll only solve for Kp when youre being asked about gases.
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Re: Kp?
Giselle Granda 3F wrote:Yes, partial pressure only applies to gases, and when you set up your Kp expression, you use parentheses instead of brackets which are used for concentration. It shouldn't be a big deal however if you use brackets or parenthesis because it will not make a difference in your answer.
Thank you for the clarification! I oftentimes forget to replace the brackets with parentheses :)
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Re: Kp?
605291562 wrote:Yeah, I believe he said in lecture for the purpose of this class we only need to think of partial pressure applied to gasses
Thank you so much, hopefully, there's nothing more to be learned for that haha :)
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Re: Kp?
Yes, partial pressures only apply to gases. I have noticed that K by itself indicated the equilibrium constant for gas reactions using bar as the standard measurement. Professor Lavelle allowed us to use atm interchangeably. Kc indicates concentration values using molarity. Hope this helps!
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Re: Kp?
Yes, partial pressure only applies to gases. Just imagine adding a solid, a liquid, and a gas into a closed box. The solid and liquid would just occupy some volume of that box, but the gas would occupied the entire volume of that box. Therefore, only the gas would have partial pressure.
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Re: Kp?
Yes, Kp only applies to partial pressure of gases, while Kc can have concentrations of both gases and aqueous solutions.
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Re: Kp?
Just a quick note as to why:
For at the level of precision we will be dealing with solids and liquids are incompressible. Thus, a change in PRESSure cannot affect the concentration of such substances.
Hope this helps!
Colm
For at the level of precision we will be dealing with solids and liquids are incompressible. Thus, a change in PRESSure cannot affect the concentration of such substances.
Hope this helps!
Colm
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