Lesson 04.01: chemical vs. physical changes and properties define and identify chemical and physical properties and changes. give examples of physical and chemical properties and changes. compare and contrast chemical and physical properties and changes.

A chemical property and a physical property are related to chemical and physical changes of matter.

 A physical property is an aspect of the matter that can be observed or measured without changing it. Examples of physical properties include color, molecular weight, and volume.

A chemical property may only be observed by changing the chemical identity of a substance.

This property measures the potential for undergoing a chemical change. Examples of chemical properties include reactivity, flammability and oxidation states.

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.