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

Question

17. Consider the following reaction at constant P. Use the information here to determine the value of ASsurr at 398 K. Predict whether or not this reaction will be spontaneous at this temperature. 4 NH3(g) + 3 O2(g) 2 N2(g) + 6 H2O(g) AH =-1267 kJ AJASsurr +12.67 kJ/K reaction is not spontaneous BASsurr =-12.67 kJ/K reaction is spontaneous CASsurr = +50.4 kJ/K reaction is not spontaneous assurr = +3.18 kJ/K, reaction is spontaneous E) ASsurr =-50.4 kJ/K, it is not possible to predict the spontaneity of this reaction without more information. A nswer: D

Explanation / Answer

17)

delta S surr = -delta H/T

= - (-1267 KJ)/398 K

= (1267 KJ)/398 K

= 3.18 KJ/K

Answer: 3.18 KJ/K

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