已知:
(1)H2(g)+1/2O2(g)=H2O(g) △H1=akJ/mol
(2)2H2(g)+O2(g)=2H2O(g) △H2=bkJ/mol
(3)H2(g)+1/2O2(g)=H2O(l) △H3=ckJ/mol
(4)2H2(g)+O2(g)=2H2O(l) △H4=dkJ/mol
下列关系式中正确的是( )
A.a<c<0 | B.b>d>0 | C.2a=b<0 | D.2c=d>0 |
已知:
(1)H2(g)+1/2O2(g)=H2O(g) △H1=akJ/mol
(2)2H2(g)+O2(g)=2H2O(g) △H2=bkJ/mol
(3)H2(g)+1/2O2(g)=H2O(l) △H3=ckJ/mol
(4)2H2(g)+O2(g)=2H2O(l) △H4=dkJ/mol
下列关系式中正确的是( )
A.a<c<0 | B.b>d>0 | C.2a=b<0 | D.2c=d>0 |
试题篮
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