The temperature coefficient of e.m.f of a cell can be given by :

The cell potential (E_(cell)) of a reaction is related as /_\G=-nF E_(cell) , where /_\G represents max. useful electrical work n=no. of moles of electrons exchanged during the section for reversible cell reaction d(/_\G)=(/_\_rV)dp-(/_\_rS),dT at constant pressure d(/_\G)=-(/_\_rS).dT :' At constant pressure /_\G=/_\H-T./_\S :. /_\G=H+T(d(/_\G))/((dT)_P) ((dE_(cell))/(dT))_P is known as temperture coefficient of the e.m.f of the cell. The temperature coefficient of the e.m.f of cell, ((dE)/(dT))_P si given by:

The standard electromitive force of the cell Fe|Fe^(2+)(aq)||Cd^(2+)|Cd is 0.0372 V The temperature coefficient of e.m.f. is -0.125VK^(-1) . Calculate the quantities triangleG,triangleH^(@) and triangleS^(@) at 25^(@)C

The temperature coefficient of the cell is ((delE)/(delT))_(P) . Choose the correct statements (s) .

The temperature coefficient, of the emf, i.e., (dE)/(dt) = -0.00065 Volt deg^(-) for the cell, Cd| CdCl_(2)(1 M) ||AgCl(s)| Ag at 25^(@) . Calculate the entropy change DeltaS_(298K) for the cell reaction, Cd + 2AgCl rightarrow Cd^(2+) + 2Cl^(-) + 2Ag

The temperature coefficient of the emf i.e. (dE)/(dT)=0.00065"volt".deg^(-1) for the cell Cd|CdCl_(2)(1M)||AgCl(s) |Ag at 25^(@)C calculate the entropy changes triangleS_(298K) for the cell reaction, Cd+2AgCltCd^(++)+2Cl^(-)+2Ag

Emf of cell given Ag(s),Ag(s)|KCI(aq)Hg_(2)CI_(2)(s)|Hg(s) s 0.05 V at 300 K and temperature coefficient of the cell is 3.34xx10^(-4) VK^(-1) calculate the change in thapy of the cell

A potentiometer wire of Length L and a resistance r are connected in series with a battery of e.m.f. E_(0) and a resistance r_(1) . An unknown e.m.f. E is balanced at a length l of the potentiometer wire. The e.m.f. E will be given by :

The relationship between the coefficient of viscosity of a liquid and temperature can be expressed as

Length of wire at room temperature is 4.55 m , when the temperature increases upto 100^(@) C then its length becomes 4.57 m . The coefficient of linear expansion (alpha) of the given wire is

The following diagram shows the circuit for the comparision of e.m.f. of the cells. The circuit can be corrected by:-