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已知下列两个热化学方程式:H2(g)+O2(g)==== H2O(l) ΔH =-285.8kJ/mol;X(g)+5O2(g)====3Y(g)+4H2O(l) ΔH =-2220.0kJ/mol,由实验测得:H2和X的混合气体,每5mol完全燃烧时可放出3837kJ热量,则此混合气体中,H2和X的体积比是()
A.1:3
B.3:1
C.1:4
D.1:1
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
A、1:3
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.1:3
B.3:1
C.1:4
D.1:1
A、1:3
A.12ΔH3+5ΔH2-2ΔH1
B.2ΔH1-5ΔH2-12ΔH3
C.12ΔH3-5ΔH2-2ΔH1
D.ΔH1-5ΔH2-12ΔH3
A.-252.9 kJ·mol-1
B.+252.9 kJ·mol-1
C.-604.5 kJ·mol-1
D.+604.5 kJ·mol-1
A.ΔH=+88 kJ/mol
B.ΔH=+2.44 kJ/mol
C.ΔH=-4.98 kJ/mol
D.ΔH=-44 kJ/mol
已知下列热化学方程式: Fe2O3(s)+3CO(g)=2Fe(s)+3CO2(g);qp=-27.6 kJmol-1 3Fe2O3(s)+C0(g)=2Fe3O4(s)+CO2(g);qp=-58.6 kJmol-1 Fe3O4(s)+C0(g)=3FeO(s)+CO2(g);qp=38.1 kJmol-1 不用查表,试计算下列反应的g。。 FeO(S)+CO(g)=Fe(S)+CO2(g)
A.金刚石比石墨稳定
B.石墨转化为金刚石需要吸热
C.金刚石燃烧产物更稳定
D.等质量时,石墨所含能量高
A.=196.64 kJ
B.=98.32 kJ
C.<196.64 kJ
D.>196.64 kJ
A.-(a-b) kJ·moL-1
B.-(a+b) kJ·moL-1
C.-(5a-0.5b) kJ·moL-1
D.-(10a-b) kJ·moL-1
298.15K时,已知下列热化学方程式
则298.15K时,CuO(s)的标准摩尔生成焓
A.Fe+S=FeS△H=-95.6kJ/mol(反应热)
B.NaOH(aq)+HCl(aq)=NaCl(aq)+H2O(l)△H=+57.3kJ/mol(中和热)
C.C2H5OH(l)+3O2(g)=2CO2(g)+3H2O(g)△H=-1367.0kJ/mol(燃烧热)
D.S(s)+O2(g)=SO2(g)△H=-269.8kJ/mol(反应热)