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Combustion Reactions: Metals, Non-Metals, and Organic Compounds
- Combustion reactions are a cornerstone of chemical processes that power modern life.
- From igniting a match to fueling vehicles, these reactions release energy through the interaction of substances with oxygen.
- But how do combustion reactions vary for metals, non-metals, and organic compounds?
What Is Combustion?
Definition
Combustion
Combustion is a chemical process where a substance, known as the fuel, reacts with oxygen (O₂), releasing energy in the form of heat and light.
This reaction requires three essential components:
- Fuel: The material undergoing combustion.
- Oxygen: The reactant that facilitates the reaction.
- Activation Energy: An initial input of energy, such as a spark or flame, to initiate the reaction.
The products of combustion depend on the type of fuel and the oxygen supply:
Definition
Complete combustion
Complete combustion occurs with excess oxygen, producing carbon dioxide (CO₂) and water (H₂O).
Definition
Incomplete combustion
Incomplete combustion happens with limited oxygen, resulting in byproducts like carbon monoxide (CO) and soot (C).
Combustion of Reactive Metals
- Reactive metals like lithium and magnesium combust readily in oxygen to form metal oxides.
- These reactions are examples of redox reactions, where the metal is oxidized (loses electrons) and oxygen is reduced (gains electrons).
$$\text{metal} + \text{oxygen} \rightarrow \text{metal oxide}$$
Balanced examples:
$$2\text{Mg}(s) + \text{O}_2(g) \rightarrow 2\text{MgO}(s)$$
