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Types of Changes and Reactions (Endothermic Reaction (More energy (To…
Types of Changes and Reactions
Chemical Changes
changes
substance reacts
forms substance
Paper reacts
Creates ash
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Exothermic Reaction
More energy released than used to break bonds
Example: Combustion
Propane reacts with oxygen; carbon dioxide, water, and energy are products
A chemical reaction that exerts energy to its environment
Endothermic Reaction
More energy
To break bonds
Absorbs energy
From its surrounding
Chemical reaction
Less energy
Released by formation
Physical Changes
Substances in the property stay the same
A change that occurs when some properties of a material change.
