100g炭粉燃烧所得气体中,CO占1/3,CO2 占2/3体积,且:C(S) +1/2 O 2(g) =CO(g) ;△H= -110.25KJ/mol,100g炭粉燃烧所得气体中,CO占1/3,CO2 占2/3体积,且:C(S) +1/2 O 2(g) =CO(g) ;△H= -110.35KJ/mol,CO(g) +1/2O2 (g) =CO 2(g) ;AH= -282
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![100g炭粉燃烧所得气体中,CO占1/3,CO2 占2/3体积,且:C(S) +1/2 O 2(g) =CO(g) ;△H= -110.25KJ/mol,100g炭粉燃烧所得气体中,CO占1/3,CO2 占2/3体积,且:C(S) +1/2 O 2(g) =CO(g) ;△H= -110.35KJ/mol,CO(g) +1/2O2 (g) =CO 2(g) ;AH= -282](/uploads/image/z/3249794-2-4.jpg?t=100g%E7%82%AD%E7%B2%89%E7%87%83%E7%83%A7%E6%89%80%E5%BE%97%E6%B0%94%E4%BD%93%E4%B8%AD%2CCO%E5%8D%A01%2F3%2CCO2+%E5%8D%A02%2F3%E4%BD%93%E7%A7%AF%2C%E4%B8%94%3AC%28S%29+%2B1%2F2+O+2%28g%29+%3DCO%28g%29+%3B%E2%96%B3H%3D+-110.25KJ%2Fmol%2C100g%E7%82%AD%E7%B2%89%E7%87%83%E7%83%A7%E6%89%80%E5%BE%97%E6%B0%94%E4%BD%93%E4%B8%AD%2CCO%E5%8D%A01%2F3%2CCO2+%E5%8D%A02%2F3%E4%BD%93%E7%A7%AF%2C%E4%B8%94%3AC%28S%29+%2B1%2F2+O+2%28g%29+%3DCO%28g%29+%3B%E2%96%B3H%3D+-110.35KJ%2Fmol%2CCO%28g%29+%2B1%2F2O2+%28g%29+%3DCO+2%28g%29++%3BAH%3D+-282)
100g炭粉燃烧所得气体中,CO占1/3,CO2 占2/3体积,且:C(S) +1/2 O 2(g) =CO(g) ;△H= -110.25KJ/mol,100g炭粉燃烧所得气体中,CO占1/3,CO2 占2/3体积,且:C(S) +1/2 O 2(g) =CO(g) ;△H= -110.35KJ/mol,CO(g) +1/2O2 (g) =CO 2(g) ;AH= -282
100g炭粉燃烧所得气体中,CO占1/3,CO2 占2/3体积,且:C(S) +1/2 O 2(g) =CO(g) ;△H= -110.25KJ/mol,
100g炭粉燃烧所得气体中,CO占1/3,CO2 占2/3体积,且:C(S) +1/2 O 2(g) =CO(g) ;△H= -110.35KJ/mol,
CO(g) +1/2O2 (g) =CO 2(g) ;AH= -282.57KJ/mol,与这些炭完全燃烧相比较,损失的热量是:
A.392.92 KJ B.2489.44KJ C.784.92KJ D.3274.3KJ
100g炭粉燃烧所得气体中,CO占1/3,CO2 占2/3体积,且:C(S) +1/2 O 2(g) =CO(g) ;△H= -110.25KJ/mol,100g炭粉燃烧所得气体中,CO占1/3,CO2 占2/3体积,且:C(S) +1/2 O 2(g) =CO(g) ;△H= -110.35KJ/mol,CO(g) +1/2O2 (g) =CO 2(g) ;AH= -282
这些炭完全燃烧相比较,损失的热量就是CO燃烧放出的热量.
100g的C有1/3是不完全燃烧的.
100*1/3=33.3g
n(C)=33.3/12=2.775mol
2.775*282.57=784.1315,接近于784.92,选C.
因为1/3取的是0.333,是近似的,所以与答案有一定的差值.