Home
Class 12
CHEMISTRY
If the DeltaG^(@) of a cell reaction A...

If the `DeltaG^(@)` of a cell reaction
`AgCI+e^(-)` is `-21.20KJ`
standard emf of cell is

A

0.329V

B

0.220V

C

`-0.220V`

D

`-0.110V`

Text Solution

Verified by Experts

The correct Answer is:
B

`DeltaG^(@)-nFE^(@)`
`-21.20=-1xx96500xxE^(@)`
`E^(@)(21.20xx1000)/(96500)`
`=0.22V`
Promotional Banner

Similar Questions

Explore conceptually related problems

For a cell reaction involving a two-electron change, the standard e.m.f. of the cell is found to be 0.295V at 25^(@)C . The equilibrium constant of the reaction at 25^(@)C will be:

The magnitude ( but not the sign ) of the standard reduction potentials of two metals X and Y are : Y^(2)+2e^(-) rarr Y |E_(1)^(c-)|=0.34V X^(2)+2e^(-) rarr X |E_(2)^(c-)|=0.25V When the two half cells of X and Y are connected to construct a cell, eletrons flow from X to Y . When X is connected to a standard hydrogen electrode (SHE) ,electrons flow from X to SHE . If standard emf (E^(c-)) of a half cell Y^(2)|Y^(o+) is 0.15V , the standard emf of the half cell Y^(o+)|Y will be

Consider the cell AG|AgBr(s)|Br^(-)||AgCI(s)|CI^(-)|Ag at 25^(@)C . The solubility product constants of AgBr & AgCI are respectively 5 xx 10^(-13) & 1 xx 10^(-10) . For what ratio of the concentration of Br^(-) & CI^(-) ions would the emf of the cell be zero?

The length of a wire of a potentiometer is 100 cm, and the e.m.f. of its standard cell is E volt. It is employed to measure the e.m.f. of a battery whose internal resistance is 0.5 Omega . If the balance point is obtained at I = 30 cm from the positive end, the e.m.f. of the battery is . where i is the current in the potentiometer wire.

The standard emf for the cell cell reaction Zn + Cu^(2+) rarr Zn^(2+) + Cu is 1.10 volt at 25^@ C . The emf for the cell reaction when 0.1 M Cu^(2+) and 0.1 M ZN^(2+) solutions are used at 25^@ =C is .

Calculate the cell e.m.f. and DeltaG for the cell reaction at 298K for the cell. Zn(s) | Zn^(2+) (0.0004M) ||Cd^(2+) (0.2M)|Cd(s) Given, E_(Zn^(2+)//Zn)^(@) =- 0.763 V, E_(Cd^(+2)//Cd)^(@) = - 0.403 V at 298K . F = 96500 C mol^(-1) .