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Science 6.1 and 6.2

Two main kinds of changes that you can see when there is a chemical reaction. 1. formation of a new substance 2. change in energy
5 evidences that a chemical reaction has occurred 1. gas formation 2. precipitate formation 3. Odor formation 4. New color formation 5. Change in temperature (energy)
What happens to energy in an endothermic reaction? It is absorbed.
What happens to energy in an exothermic reaction? It is released.
What is written on the left side of the equation? reactants
What is written on the right side of the equation? products
How is an arrow read in a chemical equation? yields
Why must an equation be balanced? To show Conservation of Mass.
Where is a coefficient written and what does it represent? To the left of the element or compound, indicating the number of atoms or molecules there are
What type of reaction is this? 2 or more substances combining to form a more complex substance synthesis
Two or more substances breaking down into simpler substances? decomposition
One element replaces another element? single replacement
Elements in one compound trade places with elements in another compound? double replacement
What kind of equation has oxygen as a reactant and carbon dioxide and water are two of the products? combustion
Created by: mtnbrook