已知酒精燃烧的热化学方程式是: C2H5OH(l) + 3O2(g)=2CO2(g) + 3H2O(l);△H= -1370.3kJ/mol. 现燃烧0.已知酒精燃烧的热化学方程式是:C2H5OH(l) + 3O2(g)=2CO2(g) + 3H2O(l);△H= -1370.3kJ/mol。现燃烧0.10g酒精,
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![已知酒精燃烧的热化学方程式是: C2H5OH(l) + 3O2(g)=2CO2(g) + 3H2O(l);△H= -1370.3kJ/mol. 现燃烧0.已知酒精燃烧的热化学方程式是:C2H5OH(l) + 3O2(g)=2CO2(g) + 3H2O(l);△H= -1370.3kJ/mol。现燃烧0.10g酒精,](/uploads/image/z/851867-35-7.jpg?t=%E5%B7%B2%E7%9F%A5%E9%85%92%E7%B2%BE%E7%87%83%E7%83%A7%E7%9A%84%E7%83%AD%E5%8C%96%E5%AD%A6%E6%96%B9%E7%A8%8B%E5%BC%8F%E6%98%AF%EF%BC%9A+C2H5OH%28l%29+%2B+3O2%28g%29%EF%BC%9D2CO2%28g%29+%2B+3H2O%28l%29%EF%BC%9B%E2%96%B3H%3D+-1370.3kJ%2Fmol.+%E7%8E%B0%E7%87%83%E7%83%A70.%E5%B7%B2%E7%9F%A5%E9%85%92%E7%B2%BE%E7%87%83%E7%83%A7%E7%9A%84%E7%83%AD%E5%8C%96%E5%AD%A6%E6%96%B9%E7%A8%8B%E5%BC%8F%E6%98%AF%EF%BC%9AC2H5OH%28l%29+%2B+3O2%28g%29%EF%BC%9D2CO2%28g%29+%2B+3H2O%28l%29%EF%BC%9B%E2%96%B3H%3D+-1370.3kJ%2Fmol%E3%80%82%E7%8E%B0%E7%87%83%E7%83%A70.10g%E9%85%92%E7%B2%BE%EF%BC%8C)
已知酒精燃烧的热化学方程式是: C2H5OH(l) + 3O2(g)=2CO2(g) + 3H2O(l);△H= -1370.3kJ/mol. 现燃烧0.已知酒精燃烧的热化学方程式是:C2H5OH(l) + 3O2(g)=2CO2(g) + 3H2O(l);△H= -1370.3kJ/mol。现燃烧0.10g酒精,
已知酒精燃烧的热化学方程式是: C2H5OH(l) + 3O2(g)=2CO2(g) + 3H2O(l);△H= -1370.3kJ/mol. 现燃烧0.
已知酒精燃烧的热化学方程式是:
C2H5OH(l) + 3O2(g)=2CO2(g) + 3H2O(l);△H= -1370.3kJ/mol。
现燃烧0.10g酒精,生成二氧化碳和液态水,放出的热量能使100g水的温度升高多少度?
是7.2 不过过程呢
[已知水的比热容c=4.184J·g-1·℃-1]
已知酒精燃烧的热化学方程式是: C2H5OH(l) + 3O2(g)=2CO2(g) + 3H2O(l);△H= -1370.3kJ/mol. 现燃烧0.已知酒精燃烧的热化学方程式是:C2H5OH(l) + 3O2(g)=2CO2(g) + 3H2O(l);△H= -1370.3kJ/mol。现燃烧0.10g酒精,
由C2H5OH(l) + 3O2(g)=2CO2(g) + 3H2O(l);△H= -1370.3kJ/mol
可知,1mol C2H5OH反应放热1370.3kJ
现在0.10g酒精的物质的量 = 0.1/46 = 0.002174mol
实际放热 = 0.002174 * 1370.3 = 2.98kJ
所以温度升高 = 2.98 * 1000 / (4.184 * 100) = 7.2℃
大约7.2度
C2H5OH 46g/mol
0.1g/46g/mol=0.002mol
所以产生的热量为1370.3*0.002=2.7406kJ
Q=cmT
T=Q/cm=0.0066