Tuesday, November 26, 2019
Difference Between Physical and Chemical Properties
Difference Between Physical and Chemical Properties Measurable characteristics of matter may be categorized as either chemical or physical properties. What is the difference between a chemical property and a physical property? The answer has to do withÃ chemical and physical changesÃ of matter. A Physical Property AÃ physical propertyÃ is an aspect of matter that can be observed or measured without changing its chemical composition.Ã Examples of physical propertiesÃ include color, molecular weight, and volume. A Chemical Property AÃ chemical propertyÃ may only be observedÃ by changing the chemicalÃ identity of a substance. In other words, the only way to observe a chemical property is by performing a chemical reaction. This property measures the potential for undergoing aÃ chemical change.Ã Examples of chemical propertiesÃ include reactivity, flammability and oxidation states. Telling Physical and Chemical Properties Apart Sometimes it can be tricky to know whether or not a chemical reaction has occurred. For example, when you melt ice into water, you can write the process in terms of a chemical reaction. However, the chemical formula on both sides of the reaction is the same. Since the chemical identity of the matter in question is unchanged, this process represents a physical change. Thus melting point is a physical property. On the other hand, flammability is a chemical property of matter because the only way to know how readily a substance ignites is to burn it. In the chemical reaction for combustion, the reactants and products are different. Look for Tell-Tale Signs of a Chemical Change Usually, you dont have the chemical reaction for a process. You can look for tell-tale signs of a chemical change. These include bubbling, color change, temperature change, and precipitation formation. If you see signs of a chemical reaction, the characteristic you are measuring is most likely a chemical property. If these signs are absent, the characteristic is probably a physical property.