由金红石(TiO2)制取单质Ti涉及到的步骤为:
TiO2TiCl4Ti
已知:①C(s)+O2(g)=CO2(g) DH=-393.5kJ·mol-1
②2CO(g)+O2(g)=2CO2(g) DH=-566kJ·mol-1
③TiO2(s)+2Cl2(g)=TiCl4(s)+O2(g) DH=+141kJ·mol-1
则TiO2(s)+2Cl2(g)+2C(s)=TiCl4(s)+2CO(g)的DH是
A.-80kJ·mol-1 | B.-160kJ·mol-1 | C.160kJ·mol-1 | D.80kJ·mol-1 |