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Difference between Physical and Chemical Change

Difference between Physical and Chemical Change

What is the difference between physical and chemical change? This is a question that has puzzled many people. In this blog post, we will attempt to answer that question and provide some examples of each type of change. We hope you find this information helpful!

What is Physical Change?

Physical changes are those that alter the internal structure of a substance but do not alter its chemical composition. These changes can involve anything from melting and dissolving to condensation and crystallization. Physical changes are typically caused by factors like temperature or pressure, and they can often be reversed through various chemical or physical means. Examples of physical changes include fermentation, which occurs when sugar is converted into alcohol, or the process of baking, where salt begins to crystallize and form a solid crust on top of bread dough. Whether external factors are responsible or the substances simply reach a critical mass, physical changes play an essential role in many different areas of science and technology.

What is Chemical Change?

Chemical change, or chemical transformation, is a process in which one or more chemical substances are altered in such a way that the original substances can no longer be recovered. Chemical changes occur when the properties of certain substances are permanently changed due to a new chemical bond between different components. This typically happens through the breaking and/or rearrangement of electrons in the molecules, resulting in a new set of characteristics that cannot be easily undone through simple physical means. Chemical changes are also often accompanied by various visible signs that indicate a drastic alteration in the substance, such as color changes, gaseous reactions, or even heat or energy production. Although this type of change can be dangerous under some circumstances, it is also necessary for many important processes and scientific applications. Ultimately, an understanding of chemical change is a key to furthering our knowledge of chemistry and the forces at work within the natural world.

Difference between Physical and Chemical Change

Physical and chemical changes are both common in nature, and all matter experiences both types of changes throughout its lifetime. Physical changes occur when a substance changes form but not composition, while chemical changes occur when a substance’s composition changes. Physical changes are often reversible, while chemical changes are usually irreversible. For example, melting ice is a physical change because it involves a change in the ice’s form from solid to liquid without changing its composition. In contrast, burning wood is a chemical change because it results in a new substance, ash, with a different composition from the original wood. Physical and chemical changes are both essential to the world around us and to the way we live our lives.


In order to better understand physical and chemical change, let’s take a closer look at each type of change. Physical change is the result of rearranging the particles in an object, while chemical change occurs when atoms or molecules are rearranged to create new substances. These changes can be difficult to tell apart, but there are some key differences. For example, physical change is usually reversible- you can undo it by reversing the steps that were taken to make the change. Chemical changes, on the other hand, are often permanent and cannot be undone without destroying the original substance. Additionally, chemical changes always produce new substances with different properties than the ones that started out as part of the reaction.

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