燃烧反应是一种化学反应,其中化合物和氧化剂反应产生热量和新产品。燃烧反应的一般形式是烃和氧之间的反应产生二氧化碳和水:烃+ O 2→CO 2 + H 2 O除了加热之外,燃烧反应也常见(尽管不是必需的)以释放光和产生火焰。为了开始燃烧反应,必须克服反应的活化能。通常,燃烧反应以匹配或其他火焰开始,其提供热量以引发反应。一旦燃烧开始,可以产生足够的热量来维持它直到燃料或氧气耗尽。燃烧反应的实例包括:2H 2 + O 2→2H 2 O +热
CH4 + 2 O2→CO2 + 2 H2O +热量其他例子包括点燃火柴或燃烧篝火。要识别燃烧反应,请在等式的反应物侧寻找氧气,并在产品侧寻找热量释放。因为它不是化学产品,所以并不总是显示出热量。有时燃料分子也含有氧气。一个常见的例子是乙醇(谷物醇),它具有燃烧反应:C2H5OH + 3O2→2CO2 + 3H2O

澳大利亚塔斯马尼亚大学化学Essay代写:燃烧反应定义

A combustion reaction is a type of chemical reaction where a compound and an oxidant is reacted to produce heat and a new product. The general form of a combustion reaction is the reaction between a hydrocarbon and oxygen to yield carbon dioxide and water: hydrocarbon + O2 → CO2 + H2O In addition to heat, it’s also common (although not necessary) for a combustion reaction to release light and produce a flame. In order for a combustion reaction to begin, the activation energy for the reaction must be overcome. Often, combustion reactions are started with a match or other flame, which provides heat to initiate the reaction. Once combustion starts, enough heat may be produced to sustain it until it runs out of either fuel or oxygen. Examples of combustion reactions include: 2 H2 + O2 → 2H2O + heat
CH4 + 2 O2 → CO2 + 2 H2O + heat Other examples include lighting a match or a burning campfire. To recognize a combustion reaction, look for oxygen in the reactant side of the equation and the release of heat on the product side. Because it isn’t a chemical product, heat isn’t always shown. Sometimes the fuel molecule also contains oxygen. A common example is ethanol (grain alcohol), which has the combustion reaction: C2H5OH + 3 O2 → 2 CO2 + 3 H2O

发表评论

电子邮件地址不会被公开。 必填项已用*标注