Physical and Chemical Properties
By: Joel Mundackal
Physical and Chemical Property definition
Physical and Chemical Change Definition
Physical changes are concerned with energy and states of matter. A physical change does not produce a new substance. Changes in state or phase (melting, freezing, vaporization, condensation, sublimation) are physical changes. Examples of physical changes include crushing a can, melting an ice cube, cutting a paper, and breaking a bottle.
Chemical changes take place on the molecular level. A chemical change produces a new substance. Examples of chemical changes include combustion (burning), cooking an egg, rusting of an iron pan, and mixing hydrochloric acid and sodium hydroxide to make salt and water.
A process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction. Examples of Chemical reaction are water displacement, color change, gas formation, and temperature change.
Reactants and Products in Chemical Reaction
In a chemical reaction, substances called reactants are changed into other substances called products. You can’t change one element into another in a chemical reaction — that happens in nuclear reaction. Instead, you create a new substance with chemical reactions.
Law of Conservation of Mass
Law of Conservation of Mass is a relation stating that in a chemical reaction, the mass of the products equals the mass of the reactants.