The Solubility Product Equilibrium Constant,K_sp,of Silver Bromide Is
5 $\times$

The solubility product equilibrium constant,K_sp,of silver bromide is
5.4 $\times$ 10^-13 at 298 K.AgBr(s) Ag⁺(aq) + Br^-(aq)
What is $\times$ _rG ^$\circ$ ? (R = 8.314 J/K.mol)

A) (-3.0 $\times$ 10¹) kJ/mol
B) (-5.87 ) kJ/mol
C) 5.87 kJ/mol
D) 3.0 $\times$ 10¹ kJ/mol
E) 7.0 $\times$ 10¹ kJ/mol