14.N2H4是一种高效清洁的火箭燃料.0.25 mol 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.N2H4(g)+ O2(g)==== N2(g)+H2O(g),ΔH=+267 kJ?mol-1 B.N2H4(g)+O2(g)====N2(g)+2H2O(g),ΔH =-534 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(l),ΔH =-133.5 kJ?mol-1 查看更多

 

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N2H4是一种高效清洁的火箭燃料。0.25 mol 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.N2H4(g)+O2 (g)====N2 (g)+ H2O (g);ΔH=+267kJ/mol

B.N2H4(g)+O2 (g)+====N2(g)+2H2O (g);ΔH=-133.5 kJ/mol

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

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

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N2H4是一种高效清洁的火箭燃料。0.25 mol 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.1/2 N2H4(g)+1/2O2(g)===1/2 N2(g)+H2O(g) ΔH=+267 kJ·mol1

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

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

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

 

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N2H4是一种高效清洁的火箭燃料。0.25 mol 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.N2H4(g)+O2(g)====N2(g)+H2O(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。0.25 mol 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.N2H4(g)+O2(g)===N2(g)+2H2O(g)   ΔH=+267 kJ·mol-1

B.N2H4(g)+O2(g)===N2(g)+2H2O(g)   ΔH=-534 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(l)   ΔH=-133.5 kJ·mol-1

 

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N2H4是一种高效清洁的火箭燃料。0.25 mol 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.N2H4(g)+O2(g)===N2(g)+H2O(g)  ΔH=+267 kJ·mol1

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

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

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

 

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