题目

My uncle hasn't been able to quit smoking, but at least he has ______. A . cut out B . cut down C . cut up D . cut off 答案：B(1)已知：Zn(s)+S(斜方)=ZnS(s) △H1= -206. 0kJ/mol；ZnS(s)+2O2(g)=ZnSO4 (s) △H2= -776. 8kJ/mol。试求由单质反应生成ZnSO4(s)的反应热，即 Zn(s)+S(斜方)+2O2(g)=ZnSO4 (s)的△H_______________。 (2)已知热化学方程式：Fe2O3(g)+3CO(g)=2Fe(s)+3CO2(g) △H= -25kJ/mol； 3Fe2O3(s)+CO(g)=2Fe3O4(s)+CO2(g) △H= -47kJ/mol; Fe3O4(s)+CO(g)=3FeO(s)+CO2(g) △H= +19kJ/mol。 写出FeO(s)被CO还原成Fe和CO2的热化学方程式____。