已知 ①C2H5OH(g)+3O2(g)==2CO2(g)+3H2O(g);△H1=-a kJ/mol; ②H2O(g)==H2O(1);△H2= -b kJ/mol; ③C已知 ①C2H5OH(g)+3O2(g)==2CO2(g)+3H2O(g);△H1=-a kJ/mol;②H2O(g)==H2O(1);△H2= -b kJ/mol; ③C2H5OH(g)==C2H5OH(1);△H3=-c kJ
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![已知 ①C2H5OH(g)+3O2(g)==2CO2(g)+3H2O(g);△H1=-a kJ/mol; ②H2O(g)==H2O(1);△H2= -b kJ/mol; ③C已知 ①C2H5OH(g)+3O2(g)==2CO2(g)+3H2O(g);△H1=-a kJ/mol;②H2O(g)==H2O(1);△H2= -b kJ/mol; ③C2H5OH(g)==C2H5OH(1);△H3=-c kJ](/uploads/image/z/1411996-4-6.jpg?t=%E5%B7%B2%E7%9F%A5+%E2%91%A0C2H5OH%28g%29%2B3O2%28g%29%3D%3D2CO2%28g%29%2B3H2O%28g%29%EF%BC%9B%E2%96%B3H1%3D-a+kJ%2Fmol%EF%BC%9B+%E2%91%A1H2O%28g%29%3D%3DH2O%281%29%EF%BC%9B%E2%96%B3H2%3D+-b+kJ%2Fmol%EF%BC%9B+%E2%91%A2C%E5%B7%B2%E7%9F%A5+%E2%91%A0C2H5OH%28g%29%2B3O2%28g%29%3D%3D2CO2%28g%29%2B3H2O%28g%29%EF%BC%9B%E2%96%B3H1%3D-a+kJ%2Fmol%EF%BC%9B%E2%91%A1H2O%28g%29%3D%3DH2O%281%29%EF%BC%9B%E2%96%B3H2%3D+-b+kJ%2Fmol%EF%BC%9B+%E2%91%A2C2H5OH%28g%29%3D%3DC2H5OH%281%29%EF%BC%9B%E2%96%B3H3%3D-c+kJ)
已知 ①C2H5OH(g)+3O2(g)==2CO2(g)+3H2O(g);△H1=-a kJ/mol; ②H2O(g)==H2O(1);△H2= -b kJ/mol; ③C已知 ①C2H5OH(g)+3O2(g)==2CO2(g)+3H2O(g);△H1=-a kJ/mol;②H2O(g)==H2O(1);△H2= -b kJ/mol; ③C2H5OH(g)==C2H5OH(1);△H3=-c kJ
已知 ①C2H5OH(g)+3O2(g)==2CO2(g)+3H2O(g);△H1=-a kJ/mol; ②H2O(g)==H2O(1);△H2= -b kJ/mol; ③C
已知 ①C2H5OH(g)+3O2(g)==2CO2(g)+3H2O(g);△H1=-a kJ/mol;
②H2O(g)==H2O(1);△H2= -b kJ/mol; ③C2H5OH(g)==C2H5OH(1);△H3=-c kJ/mol
若使23 g C2H5OH(1)完全燃烧生成H2O(1),则放出的热量为 .
已知 ①C2H5OH(g)+3O2(g)==2CO2(g)+3H2O(g);△H1=-a kJ/mol; ②H2O(g)==H2O(1);△H2= -b kJ/mol; ③C已知 ①C2H5OH(g)+3O2(g)==2CO2(g)+3H2O(g);△H1=-a kJ/mol;②H2O(g)==H2O(1);△H2= -b kJ/mol; ③C2H5OH(g)==C2H5OH(1);△H3=-c kJ
由①-③+②×3得热化学方程式:
C2H5OH(l)+3O2(g)==2CO2(g)+3H2O(l);△H=-(a+3b-c) kJ/mol;
由方程式得出:1mol C2H5OH(l)即46g C2H5OH(l)完全燃烧生成H2O(l)放出的热量为a+3b-c kJ,则23g完全燃烧生成H2O(l)放出的热量为(a+3b-c )/2 kJ