MAN公司提出的“VHRO”系统(V、H、R、O表示相应部位的某种催化剂)是一种净化柴油机尾气的模型,其示意图及相应热化学方程式如下图所示:
①(V)2NO(g)+O2(g) 2NO2(g) ∆H1 =-114.0 kJ·mol-1
②(H)CO(NH2)2(aq) + H2O (l) 2NH3(g)+CO2(g) ∆H2 = 119.2kJ·mol-1
③(R)2NH3(g)+NO(g)+NO2(g) = 2N2(g)+3H2O(g) ∆H3=-759.0kJ·mol-1
④(O)4NH3(g)+3O2(g)=2N2(g) + 6H2O(g) ∆H4 =-1530.0 kJ·mol-1
下列说法正确的是( )