10.已知下列热化学方程式: (1)CH3COOH(l)+2O2(g)===2CO2(g)+2H2O(l) △H1=-870.3kJ·mol-1 +O2(g)===CO2(g) △H2=-393.5kJ·mol-1 (3)H2(g)+O2(g)===H2O(l) △H3=-285.8kJ·mol-1. 1,3,5 则反应2C(s)+2H2(g)+O2(g)===CH3COOH(l) 的焓变△H为 ( ) A.488.3 kJ·mol-1 B.-244.15 kJ·mol-1 C.244.15kJ·mol-1 D.-488.3kJ·mol-1 查看更多

 

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已知下列热化学方程式:
①CH3COOH(l)+2O2(g)===2CO2(g)+2H2O(l) ΔH1=-870.3 kJ/mol
②C(s)+O2(g)===CO2(g) ΔH2=-393.5 kJ/mol
③H2(g)+O2(g)===H2O(l) ΔH3=-285.8 kJ/mol
则反应④2C(s)+2H2(g)+O2(g)===CH3COOH(l)的焓变为

A.488.3 kJ/molB.-224.15 kJ/mol
C.-488.3 kJ/molD.244.15 kJ/mol

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已知下列热化学方程式:

①CH3COOH(l)+2O2(g)===2CO2(g)+2H2O(l) ΔH1=-870.3 kJ/mol

②C(s)+O2(g)===CO2(g) ΔH2=-393.5 kJ/mol

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

则反应④2C(s)+2H2(g)+O2(g)===CH3COOH(l)的焓变为

A.488.3 kJ/mol                           B.-224.15 kJ/mol

C.-488.3 kJ/mol                         D.244.15 kJ/mol

 

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已知下列热化学方程式:
①CH3COOH(l)+2O2(g)===2CO2(g)+2H2O(l) ΔH1=-870.3 kJ/mol
②C(s)+O2(g)===CO2(g) ΔH2=-393.5 kJ/mol
③H2(g)+O2(g)===H2O(l) ΔH3=-285.8 kJ/mol
则反应④2C(s)+2H2(g)+O2(g)===CH3COOH(l)的焓变为
A.488.3 kJ/molB.-224.15 kJ/mol
C.-488.3 kJ/molD.244.15 kJ/mol

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已知下列热化学方程式:

①CH3COOH(l)+2O2(g)===2CO2(g)+2H2O(l) ΔH1=-870.3 kJ/mol

②C(s)+O2(g)===CO2(g) ΔH2=-393.5 kJ/mol

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

则反应④2C(s)+2H2(g)+O2(g)===CH3COOH(l)的焓变为

A.488.3 kJ/mol  B.-224.15 kJ/mol  C.-488.3 kJ/mol D.244.15 kJ/mol

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已知下列热化学方程式:

①CH3COOH(l)+2O2(g)=2CO2(g)+2H2O(l) ΔH1=-870.3 kJ/mol

②C(s)+O2(g)=CO2(g) ΔH2=-393.5 kJ/mol

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

写出由C(s)、H2(g)和O2(g)化合生成CH3COOH(l)的热化学方程式________.

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