Physical properties, such as density and melting point, are determined by the structure of the atoms or molecules in a substance.These properties can be divided into two broad categories: physical properties and chemical properties. What’s the difference between physical and chemical properties? Physical vs Chemical ChangesĮvery substance has unique properties that allow us to identify it and distinguish it from other substances. If these properties are the same, then the change is likely to be physical if they are different, then the change is likely to be chemical. In order to determine whether a change is physical or chemical, it is often helpful to consider the properties of the substances before and after the change. ![]() This kind of change is usually irreversible once a chemical reaction has taken place, the original substances can no longer be recovered.Įxamples of chemical changes include burning, cooking, and rusting. Other examples of physical changes include cutting, grinding, and melting.īy contrast, a chemical change is a change that alters the chemical composition of a substance. What Are Physical and Chemical Changes And Examples Of Each? A physical change is a change that alters the form or appearance of a substance without changing its chemical composition.įor instance, when water is heated, it changes from a liquid to a gas when it cools, it changes back to a liquid. How to tell if a change is physical or chemical
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