How will temperature affect the spontaneity of a reaction with positive H and S?A.It will be spontaneous only at T = H/S.B.A low temperature will make it spontaneous.C.Changing the temperature will not affect spontaneity.D.A high temperature will make it spontaneous.
Question
How will temperature affect the spontaneity of a reaction with positive H and S?A.It will be spontaneous only at T = H/S.B.A low temperature will make it spontaneous.C.Changing the temperature will not affect spontaneity.D.A high temperature will make it spontaneous.
Solution
The spontaneity of a reaction is determined by the Gibbs Free Energy equation: ΔG = ΔH - TΔS.
In this case, we are given that ΔH (change in enthalpy) is positive and ΔS (change in entropy) is also positive.
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If the temperature (T) is low, the term TΔS will be small. Since ΔH is positive, ΔG will likely be positive, meaning the reaction is not spontaneous.
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If the temperature is high, the term TΔS will be large. If it's large enough to outweigh the positive ΔH, then ΔG will be negative, meaning the reaction is spontaneous.
So, the correct answer is D. A high temperature will make it spontaneous.
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