cis-2-butene isomerizes to trans-2-butene with ∆G°rxn = –3.0 kJ mol-1 at 298 K. Some cis-2-butene is — Thermodynamics Chemistry Question

cis^-2-butene isomerizes to trans^-2-butene with ∆G°rxn = –3.0 kJ mol^-1 at 298 K.

Some cis^-2-butene is introduced into a vessel maintained at 298 K, along with a catalyst for isomerization. After equilibrium is attained, what is the mole fraction of cis^-2-butene in the vessel?