Ch. 7 Chemical Reactions Notes

Ch. 7 Chemical Reactions Notes -...

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Chemical Reactions/Equations Notes (Ch. 7) 13:07 Evidence of Chemical Changes - Color Change - Precipitate Formation - Energy/Heat Changes (endothermic/exothermic) - Odor Changes - Release of a gas - The emission of light - Rearrangement of atoms from reactants to products Chemical Equation - tell what substances are reacting and what substances are products - coefficients of a balanced equations tell us in what ratio the substances react or are  produced reactants   products AB + CD   CB + AD H2 + O2   H2O 2 H2+ O2  2 H2O Energy and Chemical Reactions Endothermic Reaction- Energy absorbed A + B + heat/energy   AB Exothermic Reaction- Energy released 
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A + B   AB + heat/energy Balancing Equations Law of Conservation of Mass (Lavoiser) Can’t create or destroy mass – only rearrange Chemical Reactions have to be balanced C + O2   CO2 Coefficient- numbers in front of units, to know how many there are
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This note was uploaded on 12/24/2011 for the course ECON 2023 taught by Professor Mike during the Spring '11 term at Bob Jones University.

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Ch. 7 Chemical Reactions Notes -...

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