Consider the following reaction at constant P. Use the information here to deter

Question

Consider the following reaction at constant P. Use the information here to determine the value of Ssurr at 355 K. Predict whether or not this reaction will be spontaneous at this temperature.

2NO(g) + O2(g) 2NO2(g)    H = -114 kJ

Consider the following reaction at constant . Use the information here to determine the value of  at 355 . Predict whether or not this reaction will be spontaneous at this temperature.

2(g) + (g)  2(g)  = -114

Ssurr = -114 kJ/K, reaction is spontaneous Ssurr = +114 kJ/K, reaction is spontaneous Ssurr = +321 J/K, reaction is spontaneous Ssurr = -321 J/K, reaction is spontaneous Ssurr = +114 J/K, it is not possible to predict the spontaneity of this reaction without more information.

Explanation / Answer

Ssurr = -H/T

           = -(-114kJ)/355K

           = +321.1 J/K

Ssurr is positive and the reaction is spontaneous.

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