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已知反应:H2(g)+ 1/2O2(g)=H2O(g)△H1 1/2N2(g)+O2(g)=NO2(g)△H2 1/2 N2(g)+ 3/2H2(g)=NH3(g)△H3 则反应2NH3(g)+ 7/...
题目内容:
已知反应:H2(g)+ 1/2O2(g)=H2O(g)△H1
1/2N2(g)+O2(g)=NO2(g)△H2 1/2 N2(g)+ 3/2H2(g)=NH3(g)△H3
则反应2NH3(g)+ 7/2O2(g)=2NO2(g)+3H2O(g)的△H为
A. 2△H1+2△H2﹣2△H3 B. △H1+△H2﹣△H3
C. 3△H1+2△H2+2△H3 D. 3△H1+2△H2﹣2△H3
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