Q11(c). Cell reaction and ΔG, ΔH, ΔS from emf and dE/dT
For the cell Cd | CdCl₂(sat.) || AgCl | Ag, E = 0.675 V and dE/dT = −6.5 × 10⁻⁴ V K⁻¹ at 298 K. What is the reaction taking place in the cell? What are the values of ΔG, ΔH and ΔS at 298 K?
Model answer
The free solution for 2024 answers questions 1, 2, 3, 4, 5, 8, 9, 13, 14 and 15, the ones picked in its time plan. Question 11 is answered in full in the Geo-Scientist Chemistry Paper II, 2021 to 2025 book, with every part of every paper.
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UPSC Combined Geo-Scientist (Main) Chemistry Paper II: Model Answers 2021 to 2025
- All fifteen questions of each paper, with the question printed above its answer
- Numericals worked from formula to result with units; graphs with labelled axes
- Topic-wise weightage and a topic-wise index
Coverstemperature coefficient of emfΔG = −nFEΔS = nF(dE/dT)Gibbs–Helmholtz equationgalvanic cell thermodynamics
All parts of Question 11
- 11(a) Time for 99 % and 99.9 % completion of a first-order reaction10 marks
- 11(b) Activation energy from the slope of an Arrhenius plot5 marks
- 11(c) Cell reaction and ΔG, ΔH, ΔS from emf and dE/dT5 marks