The amount of reactants used up over a period of time.
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How can we find out the rate of a chemical reaction?
The amout of products made over time.
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What affects the rate of a chemical reaction?
-Temperature -Surface area -Concentration of solution/pressure of gas -Presence of catalyst
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What is the collision theory?
The reacting particles don't just have to bump into each other. They also need enough energy to react when they collide.
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How does increasing the temperature affect the rate of a reaction?
Reaction time increases when the temperature does.
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How does a rising temperature support the collision theory?
Increasing the temperature increases the rate of the reaction because particles collide more frequently and more energetically. More of the collisions result in a reaction because a higher proportion of particles have energy greater than activation
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How does increasing the concentration of reactants/pressure of gas in solutions affect the rate of reaction?
it increases the frequency of collisions between the particles, as so increases the rate of reaction.
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What is a catalyst?
A substance that speeds up the rate of a reaction.
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How do catalysts affect the rate of a reaction?
They speed it up without being used up.
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How is energy involved in chemical reactions?
Energy may be transferred to or from the reacting substances in a chemical reaction.
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How can we use energy from exothermic reactions?
In hand warmers and self heating cans. This can be reusable or a 'One-off'
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How can we use the cooling effect from endothermic reactions?
Instant cooling packs for sporting injury's.
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Other cards in this set
Card 2
Front
How can we find out the rate of a chemical reaction?
Back
The amout of products made over time.
Card 3
Front
What affects the rate of a chemical reaction?
Back
Card 4
Front
What is the collision theory?
Back
Card 5
Front
How does increasing the temperature affect the rate of a reaction?
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