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Chemical Reactions and Energy
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Types of Chemical Reactions
7 Major Types of Reactions: Synthesis Decomposition Single Displacement Double Displacement Combustion Oxidation Reduction Types of Chemical Reactions
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A + B AB 2Na + Cl2 2NaCl 2H2 + O2 2H2O CaO + H2O Ca(OH)2
Synthesis
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Decomposition Reaction
AB A + B CaCO3 CaO + CO2 2H2O2 2H2O + O2 Decomposition Reaction
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Single Replacement A + BC B + AC 2K + 2H2O H2 + 2KOH
Cu + 2AgNO3 2Ag + Cu(NO3)2 Single Replacement
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AB + CD AD + BC Pb(NO3)2 + 2KI PbI2 + 2KNO3 CaCO3 + 2HCl CaCl2 + H2CO3
Double Displacement
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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
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2Ca + O2 2CaO Ca Ca2+ + 2e- O + 2e- O2-
OXIDATION REDUCTION LOSS GAIN ELECTRONS OXIDIZED REDUCED Oxidation & Reduction
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Chemical Bonds and Energey
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Exothermic Reactions C3H8 + 5O2 3CO2 + 4H2O kJ
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Endothermic Reactions
2HgO kJ 2Hg + O2
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Conservation of Energy
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