A process has Δ H = 200 J m o l - 1 and Δ S = 40 J K - 1 m o l - 1 . Out of the values given below choose the minimum temperature above which the process will be spontaneous:

Question

A process has Δ H = 200 J m o l - 1 and Δ S = 40 J K - 1 m o l - 1 . Out of the values given below choose the minimum temperature above which the process will be spontaneous:, 20 K, 5 K, 12 K, 4 K

MARKS App · Accepted Answer

∆ G = ∆ H - T ∆ S ....... (Gibbs Helmholtz Equation) For a reaction to be spontaneous, ∆ G 0 So, ∆ H - T ∆ S 0 ∆ H T ∆ S ∆ H ∆ S T i.e. Minimum temp. should be ⇒ ∆ H ∆ S = 200 40 = 5 K

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