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Kp equilibrium constant

Posted: Thu Feb 14, 2019 9:00 pm
by Amy Lefley 1J
When calculating the equilibrium constant using pressure, do you have to convert to atmosphere or do units not matter?

Re: Kp equilibrium constant

Posted: Thu Feb 14, 2019 9:06 pm
by Arman M 1A
I don't believe you necessarily need to always convert the pressure to atm because when you solve for Kp, you can use bars as well for the units.

Re: Kp equilibrium constant

Posted: Thu Feb 14, 2019 10:24 pm
by Eric Quach 1C
when its kp, the only thing to make sure about units is that they are all in units of pressure and the same unit of pressure. The units all cancel out in the end, making kp not have a unit.

Re: Kp equilibrium constant

Posted: Thu Feb 14, 2019 10:45 pm
by Katie Sy 1L
it doesn't matter what the units are as long as you keep them consistent for each molecule in the equilibrium equation

Re: Kp equilibrium constant

Posted: Thu Feb 14, 2019 10:53 pm
by Raj_Bains_2C
I think that atm and bar are the two units that can be used to calculate Kp values.

Re: Kp equilibrium constant

Posted: Thu Feb 14, 2019 10:59 pm
by Andre_Galenchik_2L
Why do we not add in units when calculating for Kp or Kc? We are plugging in the partial pressures and concentrations, yet we simply ignore the units?

Re: Kp equilibrium constant

Posted: Fri Mar 08, 2019 12:46 pm
by Sapna Ramappa 1J
Don't worry too much about the difference between bar and atm -- the numbers would be relatively similar, so it won't matter too much.