题目:
由金红石(TiO2)制取单质Ti,涉及到的部分步骤为:
TiO2→TiO4
Ti镁/800℃/Ar
已知:①C(s)+O2(g)=CO2(g)△H1
②2CO(g)+O2(g)=2CO2(g)△H2
③TiO2(s)+2Cl2(g)=TiCl4(s)+O2(g)△H3
则反应TiO2(s)+2Cl2(g)+2C(s)=TiCl4(s)+2CO(g)的△H为( )
A.△H3+2△H1-2△H2
B.△H3+△H1-△H2
C.△H3+2△H1-△H2
D.△H3+△H1-2△H2
答案:
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