Question

Explain properties of matter with examples .

Answer 1

Physical Properties

Physical properties are properties that can be measured or observed without changing the chemical nature of the substance. Some examples of physical properties are:

1. Color (intensive)
2. Density (intensive)
3. Volume (extensive)
4. Mass (extensive)
5. Boiling point (intensive): the temperature at which a substance boils
6. Melting point (intensive): the temperature at which a substance melts

Chemical Properties

1. The definition of a chemical property is that measuring that property must lead to a change in the substance’s chemical structure. Here are several examples of chemical properties:
2. The heat of combustion is the energy released when a compound undergoes complete combustion (burning) with oxygen. The symbol for the heat of combustion is ΔH_c.
3. Chemical stability refers to whether a compound will react with water or air (chemically stable substances will not react). Hydrolysis and oxidation are two such reactions and are both chemical changes.
4. Flammability refers to whether a compound will burn when exposed to flame. Again, burning is a chemical reaction—commonly a high-temperature reaction in the presence of oxygen.
5. The preferred oxidation state is the lowest-energy oxidation state that metal will undergo reactions in order to achieve (if another element is present to accept or donate electrons)