NTA Abhyas NEET2020ChemistryElectrochemistryPractice
For the following cell, Z n ( s ) | Z n S O 4 ( a q ) | | C u S O 4 ( a q ) | C u ( s ) when the concentration of Z n 2 + is 10 times the concentration of C u 2 + , the expression for Δ G (in J m o l - 1 ) is [F is Faraday constant; R is gas constant; T is temperature; E°(cell) = 1.1 V]
Options
- A2.303 RT – 2.2 F
- B– 2.2 F
- C2.303 RT + 1.1 F
- D1.1 F
Correct answer
A. 2.303 RT – 2.2 F
Step-by-step solution
Δ G = Δ G ° + 2.303 R T l o g 10 Q ; Q = [ Z n 2 + ] [ C u 2 - ] = - 2 F ( 1.1 ) + 2.303 R T l o g 10 10 = 2.303 R T - 2.2 F