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5G.5 pt.c

Posted: Wed Jan 09, 2019 7:25 pm
by Christopher Anisi 2K
Why is it when writing the equilibrium constant for the reaction X2 ---> 2X, the answer key included the mol fraction between X and X2? I understand that the equilibrium constant would be written as but I can't understand why they multiplied the mole fraction of the X2 and the mole fraction of X by the initial pressure?

Re: 5G.5 pt.c

Posted: Wed Jan 09, 2019 8:20 pm
by Julia Go 2L
For this problem, the diatomic molecule X2 is dissociating. This means they are separating into the individual element X. So, the reactant is X2 and the product is X.

We need to balance the equation because of conservation of matter so there is a coefficient of 2 in front of X. Hence, X2 ---> 2X