Question

When a match stick turns to ash while burning is it a chemical or physical change?

Answer 1

Physical changes influence a chemical substance's appearance but not its chemical makeup. Physical changes can be employed to separate mixtures into their constituent compounds, but not to separate compounds into chemical elements or smaller molecules. Physical alterations occur when an item or material undergoes a transformation that does not alter its chemical composition. This is in contrast to chemical change, which occurs when a substance's composition changes or when one or more compounds mix or break apart to produce new substances. In most cases, a physical alteration can be reversed by physical methods.

Complete answer:
Chemical changes occur when a material combines with another to produce a new substance, a process known as chemical synthesis, or when a molecule decomposes into two or more distinct compounds, a process known as chemical decomposition. These processes are known as chemical reactions, and they are generally irreversible until they are followed by other chemical reactions. Some reactions create heat and are referred to as exothermic reactions, while others require heat to take place and are referred to as endothermic reactions. Chemical changes are an important element of the study of chemistry.
Wood burning is a chemical change since it produces new chemicals such as carbon dioxide gas, water vapour, ash, and so on. These compounds have a completely different chemical make-up than wood.
Wood includes roughly 50 percent carbon, 40 percent oxygen, 8% hydrogen, 1% nitrogen, and 1% additional elements like calcium, potassium, and magnesium. When carbon in the form of methane or butane is present in wood, it combusts in the presence of oxygen to produce water and carbon dioxide. The heat produced by the combustion of these gases is about 260 degrees Celsius.
There are certain chemicals that do not completely burn or do not react at all. The fire ash is made up of these components. Burning is a chemical reaction that occurs when two or more atoms come together and release a substantial quantity of energy. The oxygen is one of these molecules that combines, while the other is an oxidizer. Heat and light are released as a result of the energy release. The wood burns to ash when it interacts with oxygen in the air to give activation energy. The wood must be heated to a certain temperature before it can be burned. The ignition temperature is the temperature at which a fire starts. The wood becomes a hydrocarbon when it warms up. Carbon atoms absorb energy and ascend as a result. This produces light.
Hence chemical change is the correct answer.

Note:
The atoms are rearranged during chemical reactions, and the process is followed by an energy shift as new products are produced. The interaction of sodium with water to generate sodium hydroxide and hydrogen is an example of a chemical transition. Because there is so much energy released, the hydrogen gas produced spontaneously burns in the atmosphere. Because the final products are chemically different from the components preceding the chemical reaction, this is an example of a chemical change.