Spontaneous Reaction Video Lessons

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Problem: The signs of ΔG, ΔH, and ΔS at 25°C are shown below for three reactions.Reaction      ΔG      ΔH      ΔSI                    –         +         +II                   –         –         +III                  –         –         –Which reaction(s) will proceed in the reverse direction?

FREE Expert Solution

We’re being asked which reaction(s) will proceed in the reverse direction?


The standard free energy change of a reaction (ΔG) is given by the following equation:


G = H - TS


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Problem Details

The signs of ΔG, ΔH, and ΔS at 25°C are shown below for three reactions.

Reaction      ΔG      ΔH      ΔS

I                    –         +         +

II                   –         –         +

III                  –         –         –

Which reaction(s) will proceed in the reverse direction?

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