homework 11.7 6th edition  [ENDORSED]

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Celeste 1I
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Joined: Fri Sep 28, 2018 12:18 am

homework 11.7 6th edition

Postby Celeste 1I » Sun Jan 13, 2019 10:30 pm

for part c) it asks "assuming that the initial pressure of X2 was 0.10 bar, calculate the value of K for the decomposition." the only other information given is that the reaction is a dissociation of a diatomic molecule, X2 over time and that it reaches equilibrium after 54.5% of molecules have dissociated. I don't know how to find this with only that information.

2c_britneyly
Posts: 62
Joined: Fri Sep 28, 2018 12:16 am

Re: homework 11.7 6th edition  [ENDORSED]

Postby 2c_britneyly » Mon Jan 14, 2019 11:42 am

Because they tell you it reaches equilibrium after 54.5% of the molecules dissociate, you can set up an ICE table, with the initial as .1 and the change as -(.545x.1). That will give you the final partial pressure of X2 and you can find the final pressure of 2X by doubling the change of X2 due to the mole ratio. Then you can set up your equilibrium expression, plug in the equilibrium values, and find K.


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