Consider the following reaction, for which δh > 0: 2 so2 (g) + o2 (g) ⇄ 2 so3 (g) which of following statements is false? group of answer choices when the volume is doubled, the equilibrium shifts toward reactants. when a catalyst is added to the mixture, the equilibrium is not changed. when o2 is added to the system, the equilibrium shifts toward products. when total pressure of the system is increased by adding n2, the equilibrium is not changed. when the reaction mixture is heated, the concentration of so3 decreases.