Calculate Gibb's free energy and determine if the event is spontaneous or non-spontaneous for ΔH = 42 Jand ΔS = -111 J/K at 400 K.

Question

Quizplus · Accepted Answer

Using the equation 
ΔG = ΔH - TΔS, 
we can calculate the Gibb's free energy: 
ΔG = 42 J - (400 K)(-111 J/K) 
ΔG = 42 J + 44,400 J 
ΔG = 44,442 J = 44.442 kJ 
Converting to kJ and keeping in mind that 1 kJ = 1000 J.
Since the value of ΔG is positive, the event is non-spontaneous. 
Therefore option B and D are the wrong choices. The correct answer is option A.

Calculate Gibb's Free Energy and Determine If the Event Is