The emf of cell $Zn/ZnCl_2(0.05mol\;dm^{-3})/Ag^+/AgCl(s)/Ag$ is 1.015V at 298K,the silver electrode being positive,while the temperature coefficient of its emf is $-0.00492VK^{-1}$.Write down the equation for reaction occuring when the cell is allowed to discharge and calculate changes in free energy(G)?

Question

$\begin{array}{1 1}(a)\;-162.89KJmol^{-1}&(b)\;162.89KJmol^{-1}\\(c)\;195.89KJmol^{-1}&(d)\;-195.89KJmol^{-1}\end{array}$