问题:
已知:(1)H 2(g)+ ====H 2O(g)
ΔH 1="a" kJ·mol -1
(2)2H 2(g)+O 2(g)====2H 2O(g)
ΔH 2="b" kJ·mol -1
(3)H 2(g)+ ====H 2O(l)
ΔH 3="c" kJ·mol -1
(4)2H 2(g)+O 2(g) 2H 2O(l)
ΔH 4="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)H 2(g)+ ====H 2O(g)
ΔH 1="a" kJ·mol -1
(2)2H 2(g)+O 2(g)====2H 2O(g)
ΔH 2="b" kJ·mol -1
(3)H 2(g)+ ====H 2O(l)
ΔH 3="c" kJ·mol -1
(4)2H 2(g)+O 2(g) 2H 2O(l)
ΔH 4="d" kJ·mol -1
下列关系式中正确的是( )
ΔH 1="a" kJ·mol -1
(2)2H 2(g)+O 2(g)====2H 2O(g)
ΔH 2="b" kJ·mol -1
(3)H 2(g)+ ====H 2O(l)
ΔH 3="c" kJ·mol -1
(4)2H 2(g)+O 2(g) 2H 2O(l)
ΔH 4="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 |
参考答案: