What is the different between physical and chemical propties?

Answer 1

Physical properties are properties that can be observed without a chemical reaction. Examples are melting and boiling point, or in some cases sublimation point (conversion straight from a solid to a gas), magnetism, density, luster (shiny), hardness, and color. you can observe if these properties are applicable to a substance without changing it to another substance in the process. When you test for magnetism of a metal, once you find out if it is magnetic or not, you still have the same metal, not something else. Chemical properties require a chemical reaction to take place for the properties to be observed, resulting in the substance changing into an other substance in the process. Two examples are flammability and reactivity with water. When something catches fire and the fire has burned itself out, you no longer have whatever you started off with, such as wood, but rather a pile of ash, which is mostly carbon. When something reacts with water, after it's done reacting, it is no longer what it was to begin with, otherwise it would keep reacting. To find out if chemical properties apply to a compound, you won't still have that compound if the answer is "yes".