Problem: Consider the following reaction at constant pressure. Use the information here to determine the value of ∆Ssurr at room temperature. Predict whether or not this reaction will be spontaneous at this temperature. N2 (g) + 2 O2 (g) → 2 NO2 (g)              ∆H° = + 66.4 kJ ∆Ssurr = - 223J/K, not spontaneous ∆Ssurr = + 265 J/K, not spontaneous ∆Ssurr = + 223 J/K, is spontaneous ∆Ssurr = - 66.4 J/K, not spontaneous ∆Ssurr = - 66.4 J/K, not possible to predict the spontaneity 

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Consider the following reaction at constant pressure. Use the information here to determine the value of ∆Ssurr at room temperature. Predict whether or not this reaction will be spontaneous at this temperature.

N(g) + 2 O(g) 2 NO(g)              ∆H° = + 66.4 kJ

  1. ∆Ssurr = - 223J/K, not spontaneous
  2. ∆Ssurr = + 265 J/K, not spontaneous
  3. ∆Ssurr = + 223 J/K, is spontaneous
  4. ∆Ssurr = - 66.4 J/K, not spontaneous
  5. ∆Ssurr = - 66.4 J/K, not possible to predict the spontaneity 

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