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I believe Lavelle basically just described the Van't Hoff equation as concrete evidence for the statement made earlier in the course. Before, we had to just know that temperature changed K, but this equation shows how exactly it does that.
yeah you can also think about it in terms of the Le Chatlier's principle with how heat affects what sides of equations are favored, if one side of the equation is more favored at a different heat, then the there will be greater concentration of molecules on that side and the K value would shift. Hoff's equation just quantifies this idea
I agree with the above answers. We learned in the equilibrium chapter how K changes based on whether a reaction is endothermic or exothermic. The Van T' Hoff equation just quantifies the conceptual understanding that we gained in the past. With it, we can calculate the actual change in K value for certain reactions. We basically don't have to say that K increases or decreases, we can actually calculate what it inc or decreases to.
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