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Chemical Reaction & Physical Reaction (Chemical Reaction (Real life…
Chemical Reaction & Physical Reaction
Chemical Reaction
Real life examples
Burning wood
Metal rusting
Fireworks exploding
Fruits ripening
Baking cookies
Digesting food
Coke and mentos challenge
Sodium and water
Baking soda and vinegar experiment
Mixing an acid and a base
Clues to define chemical reaction
Always forms a new substance, electrons are exchanged.
May absorb or release heat.
May change colour produce odor, create sound, release gas or produce light.
Usually cannot be undone.
Definition
A reaction that rearranges the particles of two or more substances to create at least one new substance
Electrons are exchanged and new substance is created
Major types of chemical reaction
Decomposion
Single replacement (also called as single displacement)
Double replacement (also called as double displacement)
Synthesis
Physical Reaction
Real life examples
Cutting a cloth
Water freezes and becomes ice
Dissolving Salt into hot water
Cutting our hair
Making cotton candy
Crushing a can
Shredding paper
Breaking windows
Mixing green and red marbles
Chopping a piece of raw meat
Crumpling a paper bag
Definition
Something that changes the physical properties of a substance.
A change in appearance only
Clues to define physical reaction
Do not form a new substance
Might change shape or size
Might change state of matter
Can often be undone