Consider the following reaction at constant pressure. Use the information here t

Question

Consider the following reaction at constant pressure. Use the information here to determine the value of Delta S_surr at 298 K. Predict whether or not this reaction will be spontaneous at this temperature. N_2(g) + 2O_2(g) rightarrow 2NO2 (g) Delta H = +66.4 kJ Delta S_surr = -66.4 JK^-1 mol^-1, reaction is not spontaneous Delta S_surr = +66.4 kJ K^-1 mol^-1, reaction is not spontaneous Delta S_surr = +223 J K^-1 mol^-1, reaction is spontaneous Delta S_surr = -66.4 JK^-1 mol^-1, reaction is spontaneous Delta S_surr = 223 JK^-1 mol^-1, reaction is not spontaneous

Explanation / Answer

dG rxn = dH - TdS

for equilibrium reaction dG = 0

dH - TdS = 0

dS = dH / T

dS = 66400 J/mol / 298 K

dS = 222.8 J / mol.K

So Answer option C) dS = + 223 J/mol.K , reaction is spontaneous.

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