N2H4是一种高效清洁的火箭燃料.0.25mol N2H4(g)完全燃烧生成氮气和气态水时.放出133.5KJ热量.则下列热化学方程式中正确的是 ( ) A.1/2 N2H4(g)+1/2O2 (g) ===1/2 N2(g)+H2O(g),△H=+267KJ.mol B.N2H4(g)+O2 (g) === N2(g)+2H2O(l), △H=-133.5KJ.mol C.N2H4(g)+O2 (g) === N2(g)+2H2O(g), △H=+534KJ.mol D.N2H4(g)+O2 (g) === N2(g)+2H2O(g), △H=-534KJ.mol 解析:因为放热反应.所以排除A.C,产物是气态水.所以排除B.只剩下D.因此D为正确答案. 查看更多

 

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N2H4是一种高效清洁的火箭燃料。0.25mol N2H4(g)完全燃烧生成氮气和气态水时,放出133.5kJ热量。则下列热化学方程式中正确的是

A.N2H4(g)+O2(g)===N2(g)+H2O(g)  ΔH=+267kJ·mol-1

B.N2H4(g)+O2(g)===N2(g)+2H2O(l)  ΔH=-133.5 kJ·mol-1

C.N2H4(g)+O2(g)===N2(g)+2H2O(g)  ΔH=+534 kJ·mol-1

D.N2H4(g)+O2(g)===N2(g)+2H2O(g)  ΔH=-534 kJ·mol-1

 

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N2H4是一种高效清洁的火箭燃料。0.25mol N2H4(g)完全燃烧生成氮气和气态水时,放出133.5 kJ热量。则下列热化学方程式中正确的是

A.1/2N2H4(g)+O2(g)====1/2N2(g)+1/2H2O(g);ΔH=+267 kJ·mol1

B.N2H4(g)+O2(g)====N2(g)+2H2O(g);ΔH =-534 kJ·mol1

C.N2H4(g)+O2(g)====N2(g)+2H2O(g);ΔH =+534 kJ·mol1

D.N2H4(g)+O2(g)====N2(g)+2H2O(l);ΔH =-133.5 kJ·mol1

 

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N2H4是一种高效清洁的火箭燃料。0.25mol N2H4(g)完全燃烧生成氮气和气态水时,放出133.5 kJ热量。则下列热化学方程式中正确的是

A.1/2N2H4(g)+O2(g)====1/2N2(g)+1/2H2O(g);ΔH=+267 kJ·mol1

B.N2H4(g)+O2(g)====N2(g)+2H2O(g);ΔH =-534 kJ·mol1

C.N2H4(g)+O2(g)====N2(g)+2H2O(g);ΔH =+534 kJ·mol1

D.N2H4(g)+O2(g)====N2(g)+2H2O(l);ΔH =-133.5 kJ·mol1

 

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N2H4是一种高效清洁的火箭燃料。0.25mol N2H4(g)完全燃烧生成氮气和气态水时,放出133.5 kJ热量。则下列热化学方程式中正确的是

A.1/2N2H4(g)+O2(g)====1/2N2(g)+1/2H2O(g);ΔH=+267 kJ·mol1

B.N2H4(g)+O2(g)====N2(g)+2H2O(g);ΔH =-534 kJ·mol1

C.N2H4(g)+O2(g)====N2(g)+2H2O(g);ΔH =+534 kJ·mol1

D.N2H4(g)+O2(g)====N2(g)+2H2O(l);ΔH =-133.5 kJ·mol1

 

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