A) standard free energy change is equal to zero \[\frac{5}{2}\]
B) free energy change is less than zero \[Be{{(OH)}_{2}}\]
C) standard free energy change is less than zero \[Mg{{(OH)}_{2}}\]
D) standard free energy change is greater than zero \[B{{(OH)}_{3}}\]
Correct Answer: B
Solution :
The process, \[KMn{{O}_{4}},\] is an endothermic process \[{{H}_{2}}{{O}_{2}}\] and entropy increase during this change \[1/2\]. Hence, this process is spontaneous at all temperatures above \[3/2\] (\[5/2\], so, \[7/2\] is negative, \[N_{3}^{-}\]). Thus free energy change \[+1\] will be less than zero \[{{N}_{2}}O\] at 1 atmand298K.
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