化学反应N2+3H2 = 2NH3的能量变化如图所示.该反应的热化学方程式是( ) A.N2(g)+3H2(g) = 2NH3(l), ⊿H = 2kJ/mol B.N2(g)+3H2(g) = 2NH3(g), ⊿H = 2(b-a)kJ/mol C.N2(g)+H2(g)=NH3(l) , ⊿H = kJ/mol D.N2(g)+H2(g) =NH3(g), ⊿H = (a+b)kJ/mol 查看更多

 

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化学反应N2+3H2=2NH3的能量变化如图所示,E是正值,该反应的热化学方程式是(   )

A.N2(g)+3H2(g)=2NH3(1); △H=2(a-b-c)kJ·mol-1
B.N2(g)+3H2(g)=2NH3(g);△H=2(b-a)kJ·mol-1
C.N2(g)+H2(g)=NH3(1);△H=(b+c-a)kJ·mol-1
D.N2(g)+H2(g)=NH3(g); △H=(a+b)kJ·mol

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化学反应N2+3H2=2NH3的能量变化如图所示,E是正值,该反应的热化学方程式是(   )

A.N2(g)+3H2(g)=2NH3(1); △H=2(a-b-c)kJ·mol1

B.N2(g)+3H2(g)=2NH3(g);△H=2(b-a)kJ·mol1

C.N2(g)+H2(g)=NH3(1);△H=(b+c-a)kJ·mol1

D.N2(g)+H2(g)=NH3(g); △H=(a+b)kJ·mol

 

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化学反应N2+3H2=2NH3的能量变化如图所示,E是正值,该反应的热化学方程式是(   )

A.N2(g)+3H2(g)=2NH3(1); △H=2(a-b-c)kJ·mol-1

B. N2(g)+3H2(g)=2NH3(g);△H=2(b-a)kJ·mol-1

C.N2(g)+H2(g)=NH3(1);△H=(b+c-a)kJ·mol-1

D.N2(g)+ H2(g)=NH3(g); △H=(a+b)kJ·mol

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化学反应N2+3H2=2NH3的能量变化如图所示,E是正值,该反应的热化学方程式是(   )

A.N2(g)+3H2(g)=2NH3(1); △H=2(a-b-c)kJ·mol-1

B. N2(g)+3H2(g)=2NH3(g);△H=2(b-a)kJ·mol-1

C.N2(g)+H2(g)=NH3(1);△H=(b+c-a)kJ·mol-1

D.N2(g)+ H2(g)=NH3(g); △H=(a+b)kJ·mol

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化学反应N2+3H2=2NH3的能量变化如下图所示,该反应的热化学方程式是(    )

     

A. N2(g)+3H2(g) === 2NH3(1)  △H=2(a-b-c)kJ·mol-1

B. N2(g)+3H2(g) === 2NH3(g)  △H=2(b-a)kJ·mol-1

C. N2(g)+H2(g) ===  NH3(1)  △H=(b+c-a)kJ·mol-1

D. N2(g)+H2(g) ===  NH3(g)  △H=(a+b)kJ·mol-1

 

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