The standard emf of the cell, `Cd(s) |CdCI_(2) (aq) (0.1M)||AgCI(s)|Ag(s)` in which the cell reaction is `Cd(s) +2AgCI(s) rarr 2Ag(s) +Cd^(2+) (aq)` is `0.6915 V` at `0^(@)C` and `0.6753V` at `25^(@)C`. The `DeltaH` of the reaction at `25^(@)C` is,-A. `-176 kJ`B. `-234.7 kJ`C. `+123.5 kJ`D. `-167.26 kJ`

The standard emf of the cell, `Cd(s) |CdCI_(2) (aq) (0.1M)||AgCI(s)|Ag

1.	The standard emf of the cell, `Cd(s) \|CdCI_(2) (aq) (0.1M)\|\|AgCI(s)\|Ag(s)` in which the cell reaction is `Cd(s) +2AgCI(s) rarr 2Ag(s) +Cd^(2+) (aq)` is `0.6915 V` at `0^(@)C` and `0.6753V` at `25^(@)C`. The `DeltaH` of the reaction at `25^(@)C` is,-A. `-176 kJ`B. `-234.7 kJ`C. `+123.5 kJ`D. `-167.26 kJ`
Answer» Correct Answer - D `DeltaG =- nFE^(@) = DeltaH^(@) - T DeltaS^(@)` `=-2 F xx 0.695 = DeltaH^(@) - 273 DeltaS^(@)` ...(i) `=- 2F xx 0.6753 = DeltaH^(@) - 298 DeltaS` ..(ii) Solve both equation.

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Define molar conductivity of a solution and explain how molar conductivity changes with change in concentration of a solution for a weak and a strong electrolyte.
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What are elementary reactions ?

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