A 1.9 L vessel contains a gaseous mixture with 0.455 mol SO\(_2\), 0.183 mol O\(_2\), and 0.568 mol SO\(_3\). Is the reaction at equilibrium? If not, what is the direction of the reaction?
2 SO\(_2\) + O\(_2\) \(\leftrightharpoons\) 2 SO\(_3\), K\(_C\) = 280