已知(l)=H2O(g)ΔH1=a kJ· (2)=2H2O(g)ΔH2=b k
问题:
已知(l) =H2O(g) ΔH1=a kJ·
(2) =2H2O(g) ΔH2=b kJ·
(3)=H2O(l) ΔH3=c kJ·
(4) =2H2O(l) ΔH4=d kJ·
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(l) =H2O(g) ΔH1=a kJ·
(2) =2H2O(g) ΔH2=b kJ·
(3)=H2O(l) ΔH3=c kJ·
(4) =2H2O(l) ΔH4=d kJ·
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