8. Which substance has the lowest standard molar when ,\" is less than zero, the

Question

8. Which substance has the lowest standard molar when ," is less than zero, the value of K is at 25*C? 64. (B) betweem zero and one. (A) NO(E) (C) N,OAp) (B) NO(g (D) N,Ofg) (A) less than e (C greater than 1 (D) infinite S The entropy of the sy siem for a spontaneous process 69. What is "? decreases. What can be concluded? (A) The reaction is esothermic. (B) The reaction is endothermic. (C) The entropy of the universe decreases (D) The entropy of the surroundings decreases what is the sign of AS for this reaction? (A) -1363.1 kJ (C) 571.7k (B) -571.7 (D) 1363.1 k “" (A) AS (B) AS O (C) AS> (A) add a catalyst to the system (B) decrease the partial pressure of N (C) decrease the partial pressure of O (D) decrease the partial pressure of N,O (D) The sign of AH is needed in order to predict the sign of AS 67. Which statement most likely explains why a reaction with a large negative G is not observed at a given set of (A) The reaction is not spontaneous (B) The activation energy is too high for the reaction to END OF TEST proceed at a measurable rate (C) The entropy change of the system is negative (D) The reaction is endothermic and the increase in the entropy of the system is too small to allow the system to become spontaneous.

Explanation / Answer

64)

delta G and K are related as:

delta G = -R*T*ln K

So,

when delta G is negative,

negative value = -R*T*ln K

ln K > 0

K will be greater than 1

Answer: C

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