Is burning a physical change or chemical change? This question often arises when we observe the process of combustion. To understand whether burning is a physical change or a chemical change, we need to delve into the definitions and characteristics of both types of changes.
A physical change is a transformation that does not alter the chemical composition of a substance. It involves changes in the physical properties of a substance, such as its shape, size, state, or color. Physical changes are usually reversible, meaning that the original substance can be restored by reversing the process. Examples of physical changes include melting, freezing, boiling, and sublimation.
On the other hand, a chemical change involves the formation of new substances with different chemical properties. During a chemical change, the atoms and molecules of the original substances rearrange to form new compounds. Chemical changes are usually irreversible, and the original substances cannot be restored by reversing the process. Examples of chemical changes include rusting, fermentation, and combustion.
Now, let’s analyze the process of burning. When a substance burns, it reacts with oxygen in the air to produce heat, light, and new substances. The original substance is transformed into different compounds, such as carbon dioxide, water vapor, and ash. This indicates that burning is a chemical change, as it involves the formation of new substances with different chemical properties.
In conclusion, burning is a chemical change rather than a physical change. The process of combustion involves the rearrangement of atoms and molecules, resulting in the formation of new compounds. This irreversible transformation makes burning a clear example of a chemical change.
