definition of rate of reaction
Rate of reaction
particle size
EXP solid (i.e coal) break up into smaller pieces
particle size smaller=surface area bigger=collision between particles increase= ROR increase
temperature
high temperature=particles more kinetic energy=more collision
concentration
more concentrated=more particles=more collision=ROR increased
Catalyst
catalyst have surface for particles to settle join tgt
once particle joined, leave and leave room for other particles join
can be used multiple times
cause unchanged chemically
substance add to reactants for increase ROR
need small amount
Lab catalyst: hydrogen peroxide & manganese dioxide.
Biological catalyst: enzymes
speed up ROR of life processes in animal AND plants
present in liver
cause many chemical reaction take place in liver
enzyme speed up decomposition
made from proteins
engine catalyst
car engine produce some harmful gases
before released, go through catalytic converter
platinum
rhodium
waste gas got chemical reaction inside converter
produced water, nitrogen, carbon dioxide
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