power point presentation in heat and reaction.

3. A chemical reaction involves not
only changes in chemical properties
but also in the structure of the
substance.
Change in structure involves either
bond breakage or bond
formation.When this happens energy
is either released or absorved for
the reaction to proceed.

4.  Chemical reaction can also be classified as
exothermic depending how the system
interacts with energy.
 Endothermic reaction involves the absorption
of heat by the system from the surroundings
while exothermic reaction involves the
release of heat by the system to the
surroundings.
 Heat is referred to as the energy in transit
from a body of higher gradient to a body of
lower gradient.

5. Endothermic
Reaction
In an endothermic reaction,the
system must absorb energy from
from its surrounthings for the
reaction to proceed.Thus ,the
reactant has lower energy as
compared with the product.

7. EXOTHERMIC
REACTION
 On the other hand, for an exothermic
reaction to happen,the system must
release energy to the surroundings to
attain stability of its
product.Thus,the reactant has higher
energy than its product