已知:2Zn(s)+O2 △H=-701.0kJ·mol-1 2Hg(l)+O2 △H=-181.6kJ·mol-1 則反應(yīng)Zn+ Hg(l)的△H為 A. +519.4kJ·mol-1 B. +259.7 kJ·mol-1 C. -259.7 kJ·mol-1 D. -519.4kJ·mol-1 【查看更多】

 

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已知：2Zn(s)+O2(g)=2ZnO(s)     △H=-701.0kJ·mol-1

       2Hg(1)+O2(g) =2HgO(s)      △H=-181.6kJ·mol-1

則反應(yīng)Zn(s)+HgO(s)=ZnO(s)+Hg(1)的△H為（    ）

A．+519.4 kJ·mol-1                                                                                            B．-519.4 kJ·mol-1

C．+259.7 kJ·mol-1                                                                                            D．-259.7 kJ·mol-1

 

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.已知：2Zn(s)+O2(g)=2ZnO(s)         △H=-701.0kJ·mol-1 

         2Hg(l)+O2(g)=2HgO(s)        △H=-181.6kJ·mol-1

則反應(yīng)Zn(s)+ HgO(s)=ZnO(s)+ Hg(l)的△H為

A. +519.4kJ·mol-1     B. +259.7 kJ·mol-1    C. -259.7 kJ·mol-1     D. -519.4kJ·mol-1

 

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已知：2Zn(s)+O2(g)=2ZnO(s)    △H=-701.0kJ·mol-1

       2Hg(1)+O2(g)=2HgO(s)      △H=-181.6kJ·mol-1

則反應(yīng)Zn(s)+HgO(s)=ZnO(s)+Hg(1)的△H為（    ）

A．+519.4kJ·mol-1                                                                                            B．-519.4 kJ·mol-1

C．+259.7kJ·mol-1                                                                                            D．-259.7 kJ·mol-1

 

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.已知：2Zn(s)+O2(g)=2ZnO(s)        △H=-701.0kJ·mol-1 

        2Hg(l)+O2(g)=2HgO(s)       △H=-181.6kJ·mol-1

則反應(yīng)Zn(s)+ HgO(s)=ZnO(s)+ Hg(l)的△H為

A.+519.4kJ·mol-1     B. +259.7 kJ·mol-1   C. -259.7 kJ·mol-1     D. -519.4kJ·mol-1

 

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已知：2Zn(s)+O2(g)=2ZnO(s)  ΔH=－701.0kJ·mol-1 
2Hg(l)+O2(g)=2HgO(s)  ΔH=－181.6kJ·mol-1
則反應(yīng)Zn(s)+ HgO(s)=" ZnO(s)+" Hg(l)的ΔH為

A．+519.4kJ·mol-1B．+259.7 kJ·mol-1C．－259. 7 kJ·mol-1D．－519.4kJ·mol-1

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