- 問題詳情:N2和H2合成NH3的能量變化如圖所示,該反應的熱化學方程式是( )A.N2(g)+3H2(g)=2NH3(g);△H=2(b—a)kJ/molB.N2(g)+3H2(g)=2NH3(l);△H=2(a—b—c)kJ/molC.N2(g)+H2(g)=NH3(l);△H=(b+c—a)kJ/molD.N2(g)+H2(g)=NH3(g);△H=(a+b)kJ/mol【回答】B知識點:物質構成的奧祕單元測試題型:選擇...
- 15289
- 問題詳情:N2和H2合成NH3的能量變化如圖所示,該反應的熱化學方程式是( )A.N2(g)+3H2(g)=2NH3(l) △H=2(a-b-c)kJ/molB.N2(g)+3H2(g)=2NH3(g) △H=2(b-a)kJ/molC.1/2N2(g)+3/2H2(g)=NH3(l) △H=(b+c-a)kJ/molD.1/2N2(g)+3/2H2(g)=NH3(g) △H=(a+b)kJ/mol【回答】【*...
- 28168
- 問題詳情:已達到平衡的可逆反應,增大壓強後,反應速率(v)變化如圖所示。該反應是A.N2(g)+3H2(g)2NH3(g) B.C(s)+H2O(g)CO(g)+H2(g)C.H2(g)+I2(g)2HI(g) D.Fe3+(aq)+3SCN-(aq)Fe(SCN)3(aq)【回答】C【解析】【分析】根據圖像可知,達到平衡後,增大壓強,正逆反應速率均增大,平...
- 9003
- 問題詳情:現有下列兩個圖象:下列反應中符合上述圖象的是()A.N2(g)+3H2(g)2NH3(g)ΔH<0B.2SO3(g)2SO2(g)+O2(g)ΔH>0C.4NH3(g)+5O2(g)4NO(g)+6H2O(g)ΔH<0D.H2(g)+CO(g)C(s)+H2O(g)ΔH>0【回答】【*】B【解析】由圖I可知,隨溫度升高,生成物濃度增大,即升高溫度平衡向正反應方向移動即正反...
- 9390