Published by:
CGP EDU Academic Team
Published on: August 14, 2026
Standard free energies of formation (in kJ/mol) at298 
are 
and 
for 
and pentane ( g ) respectively The value of 
for the pentane ‐ oxygen fuel cell is
Text Solution
Verified by ExpertsThe correct answer is:
A
Note that the standard free energy change of elementary substances is taken as zero.
For the fuel cell, the complete cell reaction is:
Which is the combination of the following two half reactions:
and 
Therefore, the number of electrons exchanged is 32 here, means 
. This is the trickiest part of the problem.
Volt 
Thus 
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
In the electrochemical cell: , the emfof this Daniell cell is . When the concentration is change…
The molar conductivity of a 0.5 solution of with electrolytic conductivity of at298 is
During the electrolysis of molten sodium chloride, the time required to produce 0.10 mol of chlorin…
If the for a given reaction has a negative value, which of the following gives the correct relatio…
The number of electrons delivered at the cathode during electrolysis by a current of 1 ampere in 60…
Zinc can be coated on iron to produce galvanized iron but the reverse is not possible. It is because