摘要:3.下列各组热化学方程式中.化学反应的△H前者大于后者的是 ①C(s)+O2(g)===CO2(g),△H1 C(s)+1/2O2,△H2 ②S(s)+O2(g)===SO2(g),△H3 S(g)+O2(g)===SO2(g),△H4 ③H2(g)+1/2O2(g)===H2O(l),△H5 2H2(g)+O2(g)===2H2O(l),△H6 ④CaCO3+CO2(g),△H7 CaO(s)+H2O2(s),△H8 A.① B.④ C.②③④ D.①②③
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下列各组热化学方程式中,化学反应的△H前者大于后者的是( )
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.
①C(s)+O2(g)═CO2(g);△H1 C(s)+
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②S(s)+O2(g)═SO2(g);△H3 S(g)+O2(g)═SO2(g);△H4
③H2(g)+
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④CaCO3(s)═CaO(s)+CO2(g);△H7 CaO(s)+H2O(l)═Ca(OH)2(s);△H8.
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下列各组热化学方程式中,化学反应的△H前者大于后者的是( )
①C(s)+O2(g)═CO2(g)△H1;C(s)+
O2(g)═CO(g)△H2
②H2(g)+
O2(g)═H2O(l)△H5;2H2(g)+O2(g)═2H2O(l)△H6
③NaOH(aq)+HCl(aq)═NaCl(aq)+H2O(l)△H3;NaOH(aq)+HNO3(aq)═NaNO3(aq)+H2O(l)△H4
④CaCO3(s)═CaO(s)+CO2(g)△H7;CaO(s)+H2O(l)═Ca(OH)2(s)△H8.
①C(s)+O2(g)═CO2(g)△H1;C(s)+
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②H2(g)+
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③NaOH(aq)+HCl(aq)═NaCl(aq)+H2O(l)△H3;NaOH(aq)+HNO3(aq)═NaNO3(aq)+H2O(l)△H4
④CaCO3(s)═CaO(s)+CO2(g)△H7;CaO(s)+H2O(l)═Ca(OH)2(s)△H8.
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下列各组热化学方程式中,化学反应的△H前者大于后者的是( )
①C(s)+O2(g)=CO2(g);△H1 C(s)+
O2(g)=CO(g);△H2
②2H2(g)+O2(g)=2H2O(g);△H3 2H2(g)+O2(g)=2H2O(l);△H4
③CaCO3(s)=CaO(s)+CO2(g);△H5 CaO(s)+H2O(l)=Ca(OH)2(s);△H6.
①C(s)+O2(g)=CO2(g);△H1 C(s)+
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②2H2(g)+O2(g)=2H2O(g);△H3 2H2(g)+O2(g)=2H2O(l);△H4
③CaCO3(s)=CaO(s)+CO2(g);△H5 CaO(s)+H2O(l)=Ca(OH)2(s);△H6.
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