what is combustion? based on what property of combustion can substances be classified? describe them?
Answers
Answer:
Combustion, or burning, is a high-temperature exothermic redox chemical reaction between a fuel and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke. Combustion in a fire produces a flame, and the heat produced can make combustion self-sustaining.
Combustion can be divided into three types – rapid combustion, spontaneous combustion and explosion. Fig: Types of combustion.Rapid Combustion: Combustion in which a substance burns rapidly and produces heat and flame is known as rapid combustion, such as combustion of natural gas, LPG, petrol etc.
Answer:
Combustion, with rare exceptions, is a complex chemical process involving many steps that depend on the properties of the combustible substance. It is initiated by external factors such as heat, light, and sparks. The reaction sets in as the mixture of combustibles attains the ignition temperature.
Some common physical properties are odor, density, melting point and boiling point, while some common chemical properties are heat of combustion, enthalpy of formation, toxicity, and flammability, each of which will be covered in this lesson.