题目内容
已知:
①H2(g)+1/2O2(g)=H2O(g)ΔH1=akJ·mol-1
②2H2(g)+O2(g)=2H2O(g)ΔH2=bkJ·mol-1
③H2(g)+1/2O2(g)=H2O(l)ΔH3=ckJ·mol-1
④2H2(g)+O2(g)=2H2O(l)ΔH4=dkJ·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
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题目内容
已知:
①H2(g)+1/2O2(g)=H2O(g)ΔH1=akJ·mol-1
②2H2(g)+O2(g)=2H2O(g)ΔH2=bkJ·mol-1
③H2(g)+1/2O2(g)=H2O(l)ΔH3=ckJ·mol-1
④2H2(g)+O2(g)=2H2O(l)ΔH4=dkJ·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