IB.  TYPES OF CHANGE

Concept

Demonstrations

Changes of State     

Changes of state include physical transformations of a substance among gas, liquid, and solid states and therefore include melting, freezing, boiling, condensation, and sublimation

            

            Collapsing Can

            Purification of a Liquid by Distillation

            Soxhlet Extraction of Coffee

 

Chemical Changes

Chemical changes are changes in a substance that result in new substances being formed by the making and breaking of bonds between atoms of the substance

 

 

             Decomposition of Ammonium Dichromate

 

Physical Changes

Physical changes are changes in a substance that result in no new substance being formed;  physical changes are usually changes of state

 

            

            Liquid Carbon Dioxide