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For a thermodynamically reversible reaction in a galvanic cell at temperature T, which one of the following is false
Options
(a) -ΔG = Wmax
(b) ΔG⁰ = -RT ln K
(c) ΔG = – n F Ecell
(d) ΔH =TΔS
Correct Answer:
ΔH =TΔS
Explanation:
As – ΔG = W(max). Electrical work done = nFE(cell), therefore -ΔG = nFE(cell). E⁰(cell) = RT/nF ln K(c). Therefore -ΔG = nF RT/nF ln K(c) = RT lnK(c) or ΔG⁰ = -RT ln K(c). When ΔG is zero, process does not occur. ΔG = ΔH -TΔS = 0. Therefore ΔH =TΔS.
Related Questions: - Which one of the following is present as an active ingredient in bleaching
- A solid compound X on heating gives CO₂ and a residue .
- Starch is converted into maltose by an enzyme
- The oxidation state of Cr in K₂Cr₂O₇ is
- The shape of cuprammonium ion is
Topics: Thermodynamics
(179)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which one of the following is present as an active ingredient in bleaching
- A solid compound X on heating gives CO₂ and a residue .
- Starch is converted into maltose by an enzyme
- The oxidation state of Cr in K₂Cr₂O₇ is
- The shape of cuprammonium ion is
Topics: Thermodynamics (179)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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