Published by:
CGP EDU Academic Team
Published on: August 14, 2026
The standard emf of the cell
Zn | Zn +2 (aq) || Fe +2 | Fe +3 (aq) | Pt
is 1.534 V at 25ºC and 1.576 V at 65ºC.
(i) The value of Δ Hº at 25ºC is –
Correct Answers for Comprehension Sub-Questions
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(i)
Sol. – 356 KJ mol –1
(ii)
Sol. – 202 J K –1 mol –1 (iii)
Sol. At 25ºC,
Dg Δ Gº = – nFEº = – 296 Kj mol
–1 At 65ºC
Δ Gº = – 304 kJ mol
–1 ∴ At 25º
Δ Gº = – RT lnK ⇒ ln K = 119
Δ Sº = – 
= – 202 JK
–1 mol –1 Δ Hº = Δ Gº + T Δ Sº = – 356 KJ mol
–1
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 cell the negative terminal is
Which of the following reaction is possible at anode?
For a certain redox reaction, is positive this means that
How much electricity in terms of Faraday is required to produce 100 g of Ca from molten
In electrolysis of dilute what is liberated at anode?
The quantity of charge required to obtain one mole of aluminum from is _______.