Spontaneous Reaction Video Lessons

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Problem: For the process O2 (g) → 2 O (g), ΔH ° = + 498 kJ. What would be predicted for the sign of ΔSrxn   and the conditions under which this reaction would be spontaneous? ΔSrxn                             Spontaneous             a)     positive            at low temperatures only             b)     positive            at high temperatures only             c)     negative           at high temperatures only             d)     negative           at low temperatures only

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For the process O(g) → 2 O (g), Δ° = + 498 kJ. What would be predicted for the sign of ΔSrxn   and the conditions under which this reaction would be spontaneous?

ΔSrxn                             Spontaneous

            a)     positive            at low temperatures only

            b)     positive            at high temperatures only

            c)     negative           at high temperatures only

            d)     negative           at low temperatures only

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