相关H2g12O2gH2Og的文学知识

问题详情：今有如下三个热化学方程式：H2(g)+1/2O2(g)==H2O(g) ΔH=akJ·mol－1H2(g)+1/2O2(g)==H2O(l) ΔH=bkJ·mol－12H2(g)+O2(g)==2H2O(l) ΔH=ckJ·mol－1关于它们的下列表述正确的是(   )A．2b=c         ...

问题详情：已知（1）H2(g)+1/2O2(g)=H2O(g)   ΔH1=aKJ/mol（2）2H2(g)＋O2(g)===2H2O(g)ΔH2＝bkJ/mol(3)H2(g)＋1/2O2(g)===H2O(l)ΔH3＝ckJ/mol(4)2H2(g)＋O2(g)===2H2O(l)ΔH4＝dkJ/mol 下列关系式中正确的是A．a＜c＜0         ...

问题详情：相同状况下：H2(g)+1/2O2(g)=H2O(g)；△H=－Q1kJ/mol               2H2(g)+O2(g)=2H2O(l)；△H=－Q2kJ/mol则Q1和Q2的关系为（   ）A．Q1>Q2    B．Q1=Q2    C．2Q1<Q2    D．Q1=1/2Q2【回答】C知识...

问题详情：下列能量变化表示*气燃烧热的是A．H2(g)+1/2O2(g)=H2O(g)  △H=-241.8kJ/molB．2H2(g)+O2(g)=2H2O(g)   △H=-483.6kJ/molC．2H2(g)+O2(g)=2H2O(l)   △H=-571.6kJ/molD．H2(g)+1/2O2(g)=H2O(l)  △H=-285....

问题详情：已知反应：H2(g)+1/2O2(g)=H2O(g)        ΔH1 1/2N2(g)+O2(g)=NO2(g)         ΔH21/2N2(g)+3/2H2(g)=NH3(g)      ΔH3则反应2NH3(g)+7/2O2(g)=2NO2(g)+3H2O(g)的ΔH为（ ）A.2ΔH1+2Δ...