The B.E.S.T Essay

Submitted By Marcusguard
Words: 362
Pages: 2

Chemical VS. Physical Change
Everything around us is constantly changing. Whether it’s the change in season, water turning into ice or rusting onto a metal surface. Changes are always occurring. Most these changes are classifiyed as Physical and Chemical changes. This all depends on whether a new substance is produced or if a shape or form has changed. In this Essay I will explore in depth of whart chemical and physical changes are.
Chemical Change:
“Chemical process: (chemistry) any process determined by the atomic and molecular composition and structure of the substances involved.”
(wordnetweb.princeton.edu/perl/webwn)
Chemical change is the change that results in a new substance being formed. The difference between a chemical change and a physical change is that with a physical change the substance stays the same but can change in state, phase, expansion, contraction, and mixing of chemicals examples are: melting, freezing, vaporization, condensation, sublimation. With Chemical change the substance changes on a molecular level, which means the atoms inside the substance of object are bonded together but when a new substance like a solid, liquid or gas breaks the bond it causes a change in the atoms it doesn’t cause a change in the atoms, it causes a change it what is bonded to them. E.g. water (H20) has two hydrogen’s and an oxygen bonded together. Oxygen in the atmosphere (O2) bonds with iron (Fe) to produce iron oxide Fe2O3. Thus the atoms themselves don’t change…