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Equilibrium and Energetics help!

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The answer is A, can someone explain how you got to the answer and the relation between temperature and equilibrium using the given equation? It doesn't seem to be mentioned in my book.

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For a reaction going to near completion, the equilibrium constant is much greater than 1. That narrows answer to A or C. More spontaneous reactions have more negative Gibbs energy and that happens with higher T. 

 

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1 hour ago, kw0573 said:

For a reaction going to near completion, the equilibrium constant is much greater than 1. That narrows answer to A or C. More spontaneous reactions have more negative Gibbs energy and that happens with higher T. 

 

By completion you mean favouring the forward reaction, I gather, correct me if I'm wrong. Also, where in the question is spontaneity mentioned? how exactly may it be related, I have an idea but am not sure, if you would elaborate on that please.

Thanks!

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Completion usually refers to the forward reaction. So spontaneity measures the readiness of how a reaction proceeds. Typically reactions that goes to completion have high spontaneity and that means a very negative Gibbs energy. 

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27 minutes ago, kw0573 said:

Completion usually refers to the forward reaction. So spontaneity measures the readiness of how a reaction proceeds. Typically reactions that goes to completion have high spontaneity and that means a very negative Gibbs energy. 

My thoughts exactly, thanks!

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