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Chemical Reactions and Energy

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Presentation on theme: "Chemical Reactions and Energy"— Presentation transcript:

1 Chemical Reactions and Energy

2 Types of Chemical Reactions
7 Major Types of Reactions: Synthesis Decomposition Single Displacement Double Displacement Combustion Oxidation Reduction Types of Chemical Reactions

3 A + B  AB 2Na + Cl2  2NaCl 2H2 + O2  2H2O CaO + H2O  Ca(OH)2
Synthesis

4 Decomposition Reaction
AB  A + B CaCO3  CaO + CO2 2H2O2  2H2O + O2 Decomposition Reaction

5 Single Replacement A + BC  B + AC 2K + 2H2O  H2 + 2KOH
Cu + 2AgNO3  2Ag + Cu(NO3)2 Single Replacement

6 AB + CD  AD + BC Pb(NO3)2 + 2KI  PbI2 + 2KNO3 CaCO3 + 2HCl  CaCl2 + H2CO3
Double Displacement

7 Combustion CH4 + 2O2  CO2 + H2O 2H2 + O2  2H2O
A reaction in which a substance reacts rapidly with oxygen producing heat and light! CH4 + 2O2  CO2 + H2O 2H2 + O2  2H2O Combustion

8 2Ca + O2  2CaO Ca  Ca2+ + 2e- O + 2e-  O2-
OXIDATION REDUCTION LOSS GAIN ELECTRONS OXIDIZED REDUCED Oxidation & Reduction

9 Chemical Bonds and Energey

10 Exothermic Reactions C3H8 + 5O2  3CO2 + 4H2O kJ

11 Endothermic Reactions
2HgO kJ  2Hg + O2

12 Conservation of Energy


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