Equilibrium: JEE Main 2026 Chemistry question

In a closed flask at 600 K, one mole of $\mathrm{X_2Y_4(g)}$ attains equilibrium as given below : $\mathrm{X_2Y_4(g)}\rightleftharpoons2\mathrm{XY_2(g)}$. At equilibrium, 75% $\mathrm{X_2Y_4(g)}$ was dissociated and the total pressure is 1 atm. The magnitude of $\Delta_rG^\ominus$ (in kJ mol$^{-1}$) at this temperature is ______. (Nearest Integer) (Given : $R=8.3$ J mol$^{-1}$ K$^{-1}$; $\ln10=2.3$, $\log2=0.3$, $\log3=0.48$, $\log5=0.69$, $\log7=0.84$)