把煤作為燃料可通過下列兩種途徑:
途徑ⅠC(s)+O2(g)═CO2(g);△H1<0①
途徑Ⅱ先制成水煤氣:
C(s)+H2O(g)═CO(g)+H2(g);△H2>0 ②
再燃燒水煤氣:
2CO(g)+O2(g)═2CO2(g);△H3<0③
2H2(g)+O2(g)═2H2O(g);△H4<0 ④請回答下列問題:
(1)途徑Ⅰ放出的熱量理論上
等于
等于
(填“大于”“等于”或“小于”)途徑Ⅱ放出的熱量.
(2)△H1、△H2、△H3、△H4的數(shù)學(xué)關(guān)系式是.
(3)已知:①C(s)+O2(g)=CO2(g);△H=-393.5kJ?mol?1
②2CO(g)+O2(g)=2CO2(g);△H=-566kJ?mol?1
③TiO2(s)+2Cl2(g)=TiCl4(s)+O2(g);△H=+141kJ?mol?1
則TiO2(s)+2Cl2(g)+2C(s)=TiCl4(s)+2CO(g)的△H=-80kJ?mol-1
-80kJ?mol-1
.
(4)已知下列各組熱化學(xué)方程式
(1)Fe2O3(s)+3CO(g)=2Fe(s)+3CO2△H=-25kJ/mol
(2)3Fe2O3(s)+CO(g)=2Fe3O4(s)+CO2(g)△H=-47kJ/mol
(3)Fe3O4(s)+CO(g)=3FeO(s)+CO2(g)△H=+640kJ/mol
請寫出FeO(s)被CO(g)還原成Fe和CO2(g)的熱化學(xué)方程式CO(g)+FeO(s)=Fe(s)+CO2(g)△H=-1308kJ/mol
CO(g)+FeO(s)=Fe(s)+CO2(g)△H=-1308kJ/mol
.