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Chemical reactions
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Created by
Ali Walsh
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Cards (15)
Physical
change
Matter
changes state or shape but no new
substance
is formed
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Physical
change
Ice
melting
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Chemical change
When a chemical
reaction
happens and a new
substance
is formed
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Chemical change
Rusting
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Reactants
The
substances
used by the
chemical
reaction
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Products
The
substances
produced by the
chemical
reaction
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Chemical
reaction
2 magnesium +
oxygen
→ 2 magnesium
oxide
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Exothermic
A reaction that
releases
energy as
heat
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Endothermic
A reaction that
absorbs
energy as
heat
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Law of
conservation
of
mass
- Matter cannot be created or destroyed in a chemical reaction
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Activation energy
The
minimum
amount of
energy
required so that a reaction can take place
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Molecules
can
collide
and bump into each other. If the molecules collide with enough energy, the bonds between the atoms can break and new bonds can form. This is how chemical reactions occur.
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Energy
profile diagrams
Exothermic
reactions - The energy of the reactants is
higher
than the products, energy will be released during the reaction
Endothermic reactions - The energy of the reactants is
lower
than the products, energy will be
absorbed
during the reaction
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Factors
that can affect a chemical process
Surface area
/
size
of particles
Catalysts
Temperature
Concentration
of reactants
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Catalyst
A chemical that
speeds
up a chemical reaction without being
used
up itself
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