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题型:单选题 题类:常考题 难易度:普通
新疆维吾尔自治区呼图壁县第一中学2020-2021学年高二下学期化学开学考试试卷
①C(s)+O2(g)═CO2(g);△H1 C(s)+ O2(g)═CO(g);△H2
②S(s)+O2(g)═SO2(g);△H3 S(g)+O2(g)═SO2(g);△H4
③H2(g)+ O2(g)═H2O(l);△H5 2H2(g)+O2(g)═2H2O(l);△H6
④CaCO3(s)═CaO(s)+CO2(g);△H7 CaO(s)+H2O(l)═Ca(OH)2(s);△H8 .
①H2(g)+ O2(g)═H2O(g)△H1=﹣Q1 kJ•mol﹣1②2H2O(l)═2H2(g)+O2(g)△H2=+Q2 kJ•mol﹣1 .
C2H5OH(l)+2O2(g)═2CO(g)+3H2O(g)△H1
C2H5OH(l)+3O2(g)═2CO2(g)+3H2O(g)△H2
C2H5OH(g)+3O2(g)═2CO2(g)+3H2O(l)△H3
C(s)+H2O(g)═CO(g)+H2(g)△H4
2C(s)+2H2O(g)═2CO(g)+2H2(g)△H5
其反应热大小关系正确的是( )
①C(s)+ O2(g)= CO2(g)△H1 C(s)+1/2 O2(g)= CO(g)△H2
②S(s)+ O2(g)= SO2(g)△H3 S(g)+ O2(g)= SO2(g)△H4
③H2(g)+1/2 O2(g)= H2O(l)△H5 2H2(g)+ O2(g)= 2H2O(l)△H6
④CaCO3(s))= CO2(g)+ CaO(s)△H7 CaO(s)+ H2O(l)= Ca(OH)2(s) △H8
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