This power point presentation includes types of chemical reactions and their different examples.

3. LPG + Oxygen Carbon-dioxide + Water

4. Example- Reaction of methane gas with oxygen.
Methane + Oxygen -----Water+ Carbon-dioxide
( Reactants) (Products)

6. 1. Chemical reactions takes place by Change
of State.

7. 2. Chemical reactions occur by Change of
Colour
3. Chemical reactions occur with release of
gas.

8. Whenever a chemical reaction takes place, energy
is absorbed or evolved. The absorbed or evolved
energies might be in the form of heat, light and
electrical energy etc.

9. 1. Exothermic Reaction : A reaction is said to be
exothermic if heat is evolved.
C + O2 CO2(g) H = -393.5KJ
2. Endothermic Reaction: A reaction is sad to be
endothermic if heat is absorbed.
C + 2H2(g) CH4(g) H = +74.25KJ

11. 1.Ignition of Match Stick: Light and heat is
released
2. Burning of Coal : C + O2(g) CO2(g)

13. 1. Melting of Ice – Heat is absorbed in this
process

16. Chemical
Reactions
Endothermic
Reactions
Exothermic
Reactions