热门试卷

已知：

2Zn(s)+O2(g)=2ZnO(s)△H=-701.0kJ/mol

2Hg(l)+O2(g)=2HgO(s)△H=-181.6kJ/mol

则反应Zn(s)+HgO(s)=ZnO(s)+Hg(l)的△H为

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甲醇质子交换膜燃料电池中将甲醇蒸气转化为氢气的两种反应原理是

①CH3OH(g)+H2O(g)=CO2(g)+3H2(g)△H=+49.0kJ·mol^-1

②CH3OH(g)+1/2O2(g)=CO2(g)+2H2(g)△H=－192.9kJ·mol^-1

下列说法正确的是

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已知：O2(g)=O2+(g)+e-△H1=+1175.7kJ·mol^-1

PtF6-(g)=PtF6(g)+e-△H2=+771.1kJ·mol^-1

O2+(g)+PtF6-(g)=O2PtF6(s)△H3=-482.2kJ·mol-1

则反应O2(g)+PtF6(g)=O2PtF6(s)的△H是

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下列与化学反应能量变化相关的叙述正确的是

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已知：Fe2O3(s)+C(s)=CO2(g)+2Fe(s)ΔΗ=234.1kJ·mol-1

C(s)+O2(g)=CO2(g)ΔΗ=-393.5kJ·mol-1

则2Fe(s)+O2(g)=Fe2O3(s)的ΔΗ是

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已知：

3/2CO2(g)＋2Fe(s)=Fe2O3(s)＋3/2C(s)△H=-234.1kJ·mol-1

CO2(g)=C(s)＋O2(g)△H=+393.4kJ·mol^-1

则2Fe(s)＋3/2O2(g)=Fe2O3(s)的△H是

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下列关于盖斯定律的说法不正确的是

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已知下列反应的热化学方程式为：

(1)C(s)＋O2(g)===CO2(g)　ΔH1＝－393.5kJ/mol

(2)CH3COOH(l)＋2O2(g)→2CO2(g)＋2H2O(l)ΔH2＝－870.3kJ/mol

(3)H2(g)＋1/2O2(g)===H2O(l)　ΔH3＝－285.8kJ/mol

则2C(s)＋2H2(g)＋O2(g)===CH3COOH(l)的反应热(焓变)为

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已知：

O2(g)=O2+(g)+e－△H1=+1175.7kJ/mol

PtF6－(g)=PtF6(g)+e－△H2=+771.1kJ/mol

O2+(g)+PtF6－(g)=O2PtF6(s)△H3=-482.2kJ/mol

则反应O2(g)+PtF6(g)=O2PtF6(s)的△H是

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