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Reactants
________ absorb energy as they become products, hence the products have more potential energy than the reactions.
sign
A(n) ________ is used to separate each of the reactants and each of the products.
Exothermic
________: processes that release thermal energy when they occur.
exothermic reactions
In ________, the products have less potential than the reactants.
Physical change
change in appearance of the starting material
Chemical change
change of properties between the product and reactants
Endothermic
processes that require energy in order to occur
Endothermic changes include
The physical change of ice melting, food cooking, and evaporating liquid water
Exothermic
processes that release thermal energy when they occur
Examples include
the burning of carbon in oxygen and freezing of water
Balanced Chemical Equation
C + O₂ → CO₂
Unbalanced Chemical Equation
H₂ + O₂ → H₂O
law of conservation of mass
states that matter is neither created nor destroyed in chemical reactions.
product
substance that is produced by a chemical reaction
reactant
substance that enters into a chemical reaction
Note 
Flashcard (50)