Recall that we can determine the spontaneity of the reaction based on the signs of ΔH and ΔS.
We can use the Punnett square shown below:
Classify the possible combinations of signs for a reaction's Δ H and Δ S values by the resulting spontaneity.
ΔH = - ΔH = + ΔH = + ΔH = -
ΔS = - Δ S = + Δ S = - Δ S = +
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