A.Ba(OH)2(aq)+2HCl(aq)=BaCl2(aq)+2H2O(l)△H=-114.6KJ/mol |
B.Ba(OH)2(aq)+2HCl(aq)=BaCl2(aq)+2H2O(l)△H=+114.6KJ/mol |
C.1/2Ba(OH)2(aq)+HCl(aq)=1/2BaCl2(aq)+H2O(g)△H=-57.3KJ/mol |
D.1/2Ba(OH)2(aq)+HCl(aq)=1/2BaCl2(aq)+H2O(l)△H=+57.3KJ/mol |
A.2H+(aq)+SO42-(aq)+Ba2+(aq)+2OH-(aq)═BaSO4(s)+2H2O(l)△H=-57.3kJ/mol | ||||
B.KOH(aq)+
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C.C8H18(l)+
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D.2C8H18(g)+25O2(g)═16CO2(g)+18H2O(l)△H=-5518kJ/mol |
A.热化学方程式中化学计量数表示分子个数 |
B.该反应的△H2=+483.6 kJ/mol |
C.|△H2|<|△H1| |
D.|△H2|>|△H1| |
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