Equilibrium constants table

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zfinn
Posts: 106
Joined: Fri Aug 30, 2019 12:16 am

Equilibrium constants table

Postby zfinn » Tue Jan 14, 2020 6:07 pm

how do we know which equilibrium constant of the three per equation column (the ones decreasing in value) to use? for example in the Kc column for H2+I2--> 2HI do we use 794, 160, or 54? thanks so much!

Callum Guo 1H
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Re: Equilibrium constants table

Postby Callum Guo 1H » Tue Jan 14, 2020 6:16 pm

Temperature is how you decide between the three. There should be a colmum that shows temperature for and a given K for that

Brooke Yasuda 2J
Posts: 102
Joined: Sat Jul 20, 2019 12:17 am

Re: Equilibrium constants table

Postby Brooke Yasuda 2J » Tue Jan 14, 2020 8:53 pm

Yes, you look at temperature that is given in the problem. And this also helps to solidify the concept that equilibrium constants are temperature dependent. So at different temperatures, the equilibrium constants are different.

Lindsey Chheng 1E
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Re: Equilibrium constants table

Postby Lindsey Chheng 1E » Tue Jan 14, 2020 8:56 pm

zfinn wrote:how do we know which equilibrium constant of the three per equation column (the ones decreasing in value) to use? for example in the Kc column for H2+I2--> 2HI do we use 794, 160, or 54? thanks so much!


You would have to look at the given temperature in the problem as well as if the compounds are gases because the last column in the table has the Kc for gases.

Robin Cadd 1D
Posts: 113
Joined: Thu Jul 11, 2019 12:16 am

Re: Equilibrium constants table

Postby Robin Cadd 1D » Tue Jan 14, 2020 9:02 pm

In addition to what everyone else has mentioned, make sure the temperatures you are comparing to those listed in the equilibrium constant table are in Kelvin.


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