For the following cell
 ${\mathrm{Zn}}_{\left(\mathrm{S}\right)}\left|{{\mathrm{ZnSO}}_4}_{\left(\mathrm{aq}\right)}\right||{{\mathrm{CuSO}}_4}_{\left(\mathrm{aq}\right)}+{\mathrm{Cu}}_{\left(\mathrm{s}\right)}$
When the concentration of ${\mathrm{Zn}}^{+2}$  is 10 times the concentration of ${\mathrm{Cu}}^{+2}$  , the expression for $\Delta G$$\left(inJmo{l}^{-1}\right)$  is $2.303RT-x.F$  [F is Faraday constant ; R is a gas constant; T is temperature;$E_{Cell}^0=1.1V$ ], then the value of 'x' is