1. Different Types of ___________________ ___________________

2. Different Types of Chemical Reactions

3. Today’s Targets:
To be able to describe and identify 8 different types of Chemical Reactions.

4. Why Do we Care About classifying Types of Chemical Equations???
It is human nature to want to classify things.
We classify music, food and ...
Classifying allows us to PREDICT what will happen before the reaction occurs!

5. How do We Classify types of Reactions?
1. Based on energy or heat transfer during the reaction.
2. Based on how the atoms become rearranged during the reaction.

6. How do We Classify types of Reactions?
1. Based on energy or heat transfer during the reaction.

7. Classifying based on energy/heat transfer
TYPE 1- EXOTHERMIC
THERMIC à
EXO à

8. Classifying based on energy/heat transfer
TYPE 1- EXOTHERMIC
THERMIC à HEAT
EXO à OUT

9. Classifying based on energy/heat transfer
TYPE 1- EXOTHERMIC
THERMIC à HEAT
EXO à OUT
Exothermic means a release of heat/energy out as a product.
CH4+ O2à CO2+ H20 + HEAT
(methane)

10. Classifying based on energy/heat transfer
Type 2- endothermic
THERMIC à
ENDO à

11. Classifying based on energy/heat transfer
Type 2- endothermic
THERMIC à HEAT
ENDO à IN

12. Classifying based on energy/heat transfer
Type 2- endothermic
THERMIC à HEAT
ENDO à IN
Endothermic means the reaction takes in heat/energy from it’s surrounding, as a reactant.
N2 + O2 + HEAT à 2 NO

13. Classifying reactions based on atom rearrangement
Remember:
REACTANTS are what we start with and
PRODUCTS are what we end with
2H2 + O2 à 2H2O

14. Type 3- synthesis (combination)
Description
2 or more reactants combine to make 1 single product
General Equation
A+ B à AB
Specific Example
2H2 + O2 à 2H2O
Analogy
boy meets girl = couple
Picture

15. Type 4- decomposition or breaking apart
Description
1 Single reactant is broken down into 2 or more products
General Equation
A BàA+ B
Specific Example
2H2Oà2H2 + O2
Analogy
The couple Breaks up!
Picture

16. Type 5- single replacement or substitution
Description
1 single element replaces an element in a compound
General Equation
A + BCà AC+ B
Specific Example
Ca + MgCl2à CaCl2 + Mg
Analogy
Like one girl switching dance partners
Picture

17. Type 6- double replacement
Description
When elements in 2 different compounds switch or change places
General Equation
AB + CDà AD+ CB
Specific Example
NaCl + KIà NaI + KCl
Analogy
Like 2 pairs or sets of dancers changing partners
Picture

18. Acid + Base à Salt + Water
Type 7- neutralization
Description
Acid + Base à Salt + Water
General Equation
HA + BOHà BA+ H20
Specific Example
HCl + NaOHà NaCl + H2O
Analogy
NONE
Picture
HINT: Will always have OH on reactant (left) side and H20 on product (right) side

19. Type 8- combustion or burning
Description
Hydrocarbon reacts with Oxygen (O2) to produce Heat, Carbon Dioxide (CO2) and Water (H2O)
General Equation
CxHy+ O2à CO2+ H20
Specific Example
CH4+ O2à CO2+ H20
Analogy
None
Picture
HINT: Will always have CO2+ H20 on product (right) side

20. Review 1) Energy or Heat based 1) Exothermic 2) Endothermic
2) Atom rearrangement
3) Synthesis (Combination)
4) Decomposition
5) Single Replacement (Substitution)
6) Double Replacement
7) Neutralization
8) Combustion ( Burning)

21. Classifying chemical reactions is all about _____________!!!
LAST NOTE:
Classifying chemical reactions is all about _____________!!!

22. Classifying chemical reactions is all about PATTERNS!!!
LAST NOTE:
Classifying chemical reactions is all about PATTERNS!!!