A.NaOH(aq)+HCl(aq)═NaCl(aq)+H2O(l);△H=+28.7kJ/mol |
B.NaOH(aq)+HCl(aq)═NaCl(aq)+H2O(l);△H=-28.7kJ/mol |
C.NaOH(aq)+HCl(aq)═NaCl(aq)+H2O(l);△H=+57.4kJ/mol |
D.NaOH(aq)+HCl(aq)═NaCl(aq)+H2O(l);△H=-57.4kJ/mol |
1 |
2 |
A.40% | B.50% | C.80% | D.90% |
A.CO的燃烧热为283 kJ |
B.如图可表示由CO生成CO2的反应过程和能量关系 |
C.2Na2O2(s)+2CO2(s)=2Na2CO3(s)+O2(g);△H>-452 kJ/mol |
D.CO(g)与Na2O2(s)反应放出509 kJ热量时,电子转移数为6.02×1023 |
Mg.800℃.Ar |
A.CH3OH(l)+
| ||
B.2CH3OH(l)+3O2(g)2CO2(g)+4H2O(l)△H=-1452kJ/mol | ||
C.2CH3OH(l)+3O2(g)2CO2(g)+4H2O(l)△H=-725.8kJ/mol | ||
D.2CH3OH(l)+3O2(g)2CO2(g)+4H2O(l)△H=+1452kJ/mol |
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