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Physical properties are those that can be observed without changing the identity of the substance. The general properties of matter such as color, density, hardness, are examples of physical properties. Properties that describe how a substance changes into a completely different substance are called chemical properties. Flammability and corrosion/oxidation resistance are examples of chemical properties. Physical and Chemical Properties. The difference between a physical and chemical property is straightforward until the phase of the material is considered. When a material changes from a solid to a liquid to a vapor it seems like them become a difference substance.
During a chemical change, the composition of the substance is changed. When a chemical change occurs new substances are formed through a reorganization of the atoms. A chemical change is irreversible. An example of chemical change is the fireworks explosion. Chemical Changes are also called Chemical Reactions. The chemical reaction produces one or more products, which usually have properties different from the reactants and have different physical and chemical properties.