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Stack #174719

Chemical Reactions Review

Chemical Reactions the process by which chemical changes occur (atoms are rearranged and chemical bonds are broken and formed)
Chemical Change a change of one substance into another substance (molecular level)
Physical Change a change of one substance (states of matter or energy)
Reactants substances present at the beginning of the chemical reaction
Products substances formed by a chemical reaction (end)
Law of Conservation of Mass in a chemical reaction atoms are neither created nor destroyed (all atoms present in the reactants are present in the products)
Bond Energy energy associated with bonds
Exothermic Reactions reaction in which energy is released
Endothermic Reactions reaction in which energy is absorbed
Evidence of chemical reactions: •Color change•Formation of a precipitate (solid product)•Formation of a gas•Temperature change
Rates of chemical reactions can vary based on: •Concentration•Surface area•Temperature
Created by: cemarcum