已知(1)H2(g)+1/2O2(g)===H2O(g) △H1="a" kJ·mol-1
(2)2H2(g)+O2(g)===2H2O(g) △H2="b" kJ·mol-1
(3)H2(g)+1/2O2(g)===H2O(l) △H3="c" kJ·mol-1
(4)2H2(g)+O2(g)===2H2O(l) △H4="d" kJ·mol-1
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="a" kJ·mol-1
(2)2H2(g)+O2(g)===2H2O(g) △H2="b" kJ·mol-1
(3)H2(g)+1/2O2(g)===H2O(l) △H3="c" kJ·mol-1
(4)2H2(g)+O2(g)===2H2O(l) △H4="d" kJ·mol-1
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 |