In the extraction of chlorine from brine_________

Options

A. `DeltaG^(ө)` for the overall reaction is negative
B. `DeltaG^(ө)` for the overall reaction is positive
C. `E^(ө)` for the overall reaction has negative value
D. `E^(ө)` for the overall reaction has positive value

Answer

B, C

Explanation

(b,c) Electrolysis of brine solution is used to extract chlorine. Overall chemical reacation occuring in this process and value of `DeltaG^(@)` can be shown as
`2H_(2)O(l)+2Cl^(-) (aq) to H_(2)(g)+Cl_(2)(g)+2OH^(-)(aq)`
For the given reaction, value of `DeltaG^(@)` is 422kJ
Using `DeltaG^(@)= -nFE^(@)`, the value of `E^(@)=E^(@)-22V`.
Therefore, `DeltaG^(@)` for the overall reaction is positive and `E^(@)` has negative value.