In the chemical reaction X⇌Y , the standard Gibb’s energy depends on temperature T(in kelvin) as ΔGreaction  in KJ.mole-1=120-38TThe major component in the equilibrium mixture at given temperature is

ΔGreaction =ΔG0+2.303RTlog(Q)At equilibrium ΔGreaction =0 , by comparing the given equation at equilibrium 120=38TT = 320 KIs temperature is less than 320 K reaction quotient (Q) will be greater than equilibrium constant. Which drive the equilibrium backward  ΔGBachward =-vemake ‘X’ as major product