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Postby 805132275 » Wed Jan 09, 2019 11:03 am

During the first lecture, Dr. Lavelle noted that the products were more stable than the reactants? Is this ALWAYS the case? Or was it simply because the diagram he drew was exothermic?

Michelle Fu 1H
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Re: Stability

Postby Michelle Fu 1H » Wed Jan 09, 2019 11:32 am

It depends on the K. When the products are more stable more will be produced, meaning that the K will be larger. When the reactants are more stable they will wish to not react as much, thus there will be more reactants and thus K will be smaller. So to answer your question, no, the product is not always more stable.

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Re: Stability

Postby KatrinaPho_2I » Wed Jan 09, 2019 3:28 pm

Reactions will try to reach the most stable state as it reaches equilibrium. If products are more stable, more products will be produced and its concentration will be higher than the reactant concentration. This leads to a Higher K value. If reactants are more stable, the reactants will not react as much and its concentration will be higher than the product concentration. This leads to a smaller K value.

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Re: Stability

Postby 2c_britneyly » Wed Jan 09, 2019 4:07 pm

Products are not always more stable than reactants. In his example the K value just happened to be large, meaning the reaction favors the products. Reactants can also be more stable than reactants, which would mean a smaller K value.

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