A student made measurements on some electrochemical cells and calculated three q
ID: 1070697 • Letter: A
Question
A student made measurements on some electrochemical cells and calculated three quantities: The standard reaction free energy delta G degree. The equilibrium confidant K at 25.0 degree C. The cell potential under standard conditions E degree. His results are listed below. Unfortunately, the student may have made some mistakes. Examine his results carefully and tick the box next to the incorrect quantity In each row, If any. Also for each cell, the number n of electrons transferred per redox reaction is 1.Explanation / Answer
for spontaneous reaction,
G is negative
K>1
E > 0
cell A:
G and EO suggests that reaction is spontaneous.But K is less than 1.
Hence K is wrong
cell B:
G and EO suggests that reaction is non spontaneous.But K is greater than 1.
Hence K is wrong
cell C:
E and K suggest than reaction is non spontaneous but G suggest that reaction is spontaneous.
Hence G is wrong
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