MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryElectrochemistryPrevious Year Questions
For the reduction of silver ions with copper metal, the standard cell potential was found to be +0.46 V at 25ºC. The value of standard Gibbs energy, ∆Gº will be (F = 96500 C mol–1) [CBSE AIPMT 2010]
A.–98.0 kJ
B.–89.0 kJ✓ Correct
C.–89.0 J
D.–44.5 kJ
Explanation
Cu + 2Ag+ -> Cu2+ + 2Ag ∆Gº = –nFEº = –2 × 96500 × 0.46 = –88780 J –89 kJ
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