This document discusses chemical reactions and energy changes. It explains that chemical bonds contain potential energy and energy can be released or absorbed as bonds are broken or formed in reactions. It defines oxidation as the loss of electrons and reduction as the gain of electrons. As an example, it shows the redox reaction of methane and oxygen producing carbon dioxide, energy, and water, with methane undergoing oxidation and oxygen undergoing reduction.

1. REPORTED BY:
PATRICIA CLARIZA SANTOS

2. The chemical bond of molecules that hold atoms
together contain the potential energy. As
chemical bonds are broken or formed in
reactions, energy can be:
RELEASE
D
ABSORB
OXIDATION : means of loss or partial loss of one or
more electrons.
REDUCTION : a gain or partial gain of one or
more electrons.

3. CH4 + 2O2 CO2 + energy + 2 H2O
OXIDATION
REDUCTIO
N
REDOX REACTION