Reaction A has #DeltaG_(rxn) = −"100 kJ/mol"#. Reaction B has #DeltaG_(rxn) = −"200 kJ/mol"#. Can you say anything about the relative speeds (reaction rates) for these two reactions?

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Feb 9, 2018

Of course not. #DeltaG# is a thermodynamic parameter, and speed is kinetic. We cannot relate #DeltaG_(rxn)# to activation energy, and thus, we cannot say anything about reaction rate.

We CAN say that both reactions are spontaneous, and that reaction B is MORE spontaneous. Which one has a greater tendency to shoot towards equilibrium? Which one is closer to equilibrium right now?

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