已知:(1)H2(g)+O2(g)=H2O(g) ΔH1=akJ·mol-1
(2)2H2(g)+O2(g)=2H2O(g) ΔH2=bkJ·mol-1
(3)H2(g)+O2(g)=H2O(l) ΔH3=ckJ·mol-1
(4)2H2(g)+O2(g)=2H2O(l) ΔH4=dkJ·mol-1;下列关系式中正确的是( )
A.a<c<0 B.2a=b<0 C.b>d>0 D.2c=d>0
高二化学单选题中等难度题
已知:
①H2(g)+O2(g)═H2O(g)△H1=akJ/mol
②2H2(g)+O2(g)═2H2O(g)△H2=bkJ/mol
③H2(g)+O2(g)═H2O(1)△H3=ckJ/mol
④2H2(g)+O2(g)═2H2O(1)△H4=dkJ/mol.
A.a<c<0 B.b>d>0 C.2a=b<0 D.2c=d>0
高二化学选择题中等难度题查看答案及解析
已知:(1)H2(g)+O2(g)=H2O(g) ΔH1=akJ·mol-1
(2)2H2(g)+O2(g)=2H2O(g) ΔH2=bkJ·mol-1
(3)H2(g)+O2(g)=H2O(l) ΔH3=ckJ·mol-1
(4)2H2(g)+O2(g)=2H2O(l) ΔH4=dkJ·mol-1;下列关系式中正确的是( )
A.a<c<0 B.2a=b<0 C.b>d>0 D.2c=d>0
高二化学单选题中等难度题查看答案及解析
已知
⑴ H2(g)+ 1/2O2(g)==H2O(g);△H1=aKJ•mol-1
⑵ 2H2(g)+O2(g)==2H2O(g);△H2=bKJ•mol-1
⑶ H2(g)+1/2O2(g)==H2O(l); △H3=cKJ•mol-1
⑷ 2H2(g)+O2(g)==2H2O(l);△H4=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
高二化学选择题简单题查看答案及解析
已知:①H2(g)+ O2(g)=H2O(g);ΔH1= akJ·mol-1
②2H2(g)+O2(g) = 2H2O(g);ΔH2= b kJ·mol-1 ③ H2(g)+ O2(g)=H2O(l);ΔH3= c kJ·mol-1
④2H2(g)+O2(g) = 2H2O(l);ΔH4= d kJ·mol-1,下列关系式中正确的是( )
A.2a=b<0 B.b>d>0 C.a<c<0 D.2c=d>0
高二化学单选题简单题查看答案及解析
已知:①H2(g)+ O2(g)=H2O(g);ΔH1= akJ·mol-1
②2H2(g)+O2(g) = 2H2O(g);ΔH2= b kJ·mol-1 ③ H2(g)+ O2(g)=H2O(l);ΔH3= c kJ·mol-1
④2H2(g)+O2(g) = 2H2O(l);ΔH4= d kJ·mol-1,下列关系式中正确的是( )
A.2a=b<0 B.b>d>0 C.a<c<0 D.2c=d>0
高二化学单选题简单题查看答案及解析
已知:①H2(g)+ O2(g)=H2O(g);ΔH1= akJ·mol-1
②2H2(g)+O2(g) = 2H2O(g);ΔH2= b kJ·mol-1 ③ H2(g)+ O2(g)=H2O(l);ΔH3= c kJ·mol-1
④2H2(g)+O2(g) = 2H2O(l);ΔH4= d kJ·mol-1,下列关系式中正确的是( )
A.2a=b<0 B.b>d>0 C.a<c<0 D.2c=d>0
高二化学单选题简单题查看答案及解析
已知:①H2(g)+ O2(g)=H2O(g);ΔH1= akJ·mol-1
②2H2(g)+O2(g) = 2H2O(g);ΔH2= b kJ·mol-1 ③ H2(g)+ O2(g)=H2O(l);ΔH3= c kJ·mol-1
④2H2(g)+O2(g) = 2H2O(l);ΔH4= d kJ·mol-1,下列关系式中正确的是( )
A.2a=b<0 B.b>d>0 C.a<c<0 D.2c=d>0
高二化学单选题简单题查看答案及解析
已知:(1)H2(g)+1/2O2(g)===H2O(g) ΔH1=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
高二化学选择题中等难度题查看答案及解析
已知:(1)H2(g)+1/2O2(g)===H2O(g) ΔH1=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
高二化学选择题中等难度题查看答案及解析
已知:(1)H2(g)+1/2O2(g)===H2O(g) ΔH1=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
高二化学选择题中等难度题查看答案及解析