ICE Chart with Gas Pressures

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Isabel_Eslabon_2G
Posts: 93
Joined: Wed Sep 30, 2020 9:50 pm

ICE Chart with Gas Pressures

Postby Isabel_Eslabon_2G » Sun Jan 17, 2021 1:55 pm

Hello.

So when we are given Kp and pressures of compounds in bar, do we just use those pressures in the ICE chart instead of molarity amounts? Adding onto that, do we need to convert to atm?

Gwendolyn Hill 2F
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Re: ICE Chart with Gas Pressures

Postby Gwendolyn Hill 2F » Sun Jan 17, 2021 1:58 pm

Hi!
So for the sake of this class, Lavelle said that we are using 1 bar = 1 atm, so you can just kind of "say" they are equal. And yes! That is how you would do the ICE chart. Use whatever version of the compounds you are given unless stated otherwise!

Keshav Patel 14B 2B
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Joined: Wed Sep 30, 2020 9:40 pm

Re: ICE Chart with Gas Pressures

Postby Keshav Patel 14B 2B » Sun Jan 17, 2021 2:46 pm

Yup exactly you want to use bar and you want to use pressures not molarity. Pressure equilibrium is different from concentration of molarity.

Kat Stahl 2K
Posts: 97
Joined: Wed Sep 30, 2020 10:03 pm

Re: ICE Chart with Gas Pressures

Postby Kat Stahl 2K » Sun Jan 17, 2021 3:00 pm

Yea! you just use the pressure values instead of molarity values! We use bar and atm and lavelle told us they are basically interchangeable.

Rose_Malki_3G
Posts: 127
Joined: Wed Sep 30, 2020 10:02 pm

Re: ICE Chart with Gas Pressures

Postby Rose_Malki_3G » Sun Jan 17, 2021 3:10 pm

Yes we use them in the ice chart like we would with concentrations. You do not need to convert the units.

Joshua Chung 2D
Posts: 96
Joined: Wed Sep 30, 2020 9:32 pm

Re: ICE Chart with Gas Pressures

Postby Joshua Chung 2D » Sun Jan 17, 2021 3:24 pm

Yep; they are completely interchangeable in this coursel; just remember to keep the units of measurement consistent throughout the problem.

Charlotte Adams 1A
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Re: ICE Chart with Gas Pressures

Postby Charlotte Adams 1A » Sun Jan 17, 2021 3:29 pm

Yes, you do the same ICE table and procedure as you would if given concentration and I remember Dr. lavelle saying 1 bar= 1atm

Kristina Krivenko 3I
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Re: ICE Chart with Gas Pressures

Postby Kristina Krivenko 3I » Sun Jan 17, 2021 3:34 pm

Hi! Yes, you're correct! If we're given Kp and partial pressures, we can use ICE table just like we would if we were given Kc and molar concentrations.

And since 1 atm = 1.01325 bar, Dr. Lavelle mentioned in his lecture that, in this course, we can approximate that 1 atm = 1 bar to simplify our approximations.

Christine Ma 3L
Posts: 93
Joined: Wed Sep 30, 2020 9:35 pm

Re: ICE Chart with Gas Pressures

Postby Christine Ma 3L » Sun Jan 17, 2021 3:49 pm

The above posters already talked about how you can just use pressures instead of concentration in the ICE chart. But for the unit question, you don't need to convert to atm. Unless the question requires it or it makes calculations easier, you can leave your answer in bar.


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