surface area, concentration, catalysts,temperature and pressure
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what is the word equation for calculating rates of reaction?
rate of reaction = amount of reactant used/time or amount of product formed/time
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what are the units of rates of reaction?
g/s or g/ min, cm^3/cm^3/min
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what is activation energy?
the minimum energy needed to start a reaction
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what is the collision theory?
particles must collide with the correct orientation and with the right amount of activation energy; frequent collisions = successful
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what are the ways to measure the rate of reaction?
precipitation, change in mass, volume of gas given off
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more on collision theory?
more frequent collisions increases the rate of reaction: 1. higher temperature 2. higher concentration (or pressure) 3. large surface area 4. catalysts increase the number of successful collisions.
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what is a catalyst?
a substance that changes speed of reaction without getting used up; lowers activation energy
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what does it do to the rate of reaction?
creates an alternative route for the reaction so it lowers the activation energy
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what is an exothermic reaction?
gives out energy to the surroundings usually in a form of heat and is shown by rise in temperature
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what is an endothermic reaction?
takes in energy from the surroundings usually shown by decrease in temperature
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what is a reversible reaction?
where the produces of the reaction can themselves react to produce the original reactants
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what is equilibrium?
the reactions are taking place in both directions but the overall effect is nil because they are occurring at the same rate
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Other cards in this set
Card 2
Front
what is the word equation for calculating rates of reaction?
Back
rate of reaction = amount of reactant used/time or amount of product formed/time
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