TiO2(s)+2Cl2(g)═TiCl4(1)+O2(g)△H=+140.5kJ/mol
C(s,石墨)+ O2(g)═CO(g)△H=﹣110.5kJ/mol
则反应TiO2(s)+2Cl2(g)+2C(s,石墨)═TiCl4(1)+2CO(g)的△H=kJ/mol.
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