C3 flashcards

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What do exothermic reactions do?
they release energy to the surroundings and cause temperature rise
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What do endothermic reactions do?
they absorb energy from the surroundings and cause temperature drop
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What factors affect the cost of making a drug?
the drug can be more expensive if the materials are costly, research and developing the drug can take time and cost a lot of money and finally high qualified staff are needed or expensive high standard machines so this affects the cost of the drug
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What are the uses of Buckminister fullerene?
it is used in drugs such as new h.i.v treatment as it gets rid of illness/ pain all over the body
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Why do all substances have high melting points?
...... has a high melting point because ...... has strong intermolecular forces that need a lot of heat to break
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Why does graphite conduct electricity
graphite contains delocalised electrons (free electrons) these electrons can move through the graphite, carrying charge from place to place and allowing graphite to conduct electricity
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What is the criteria for a batch process?
firstly; it can make a product on demand on a small scale and it can be changed to make a variety of products
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How do you find percentage yield?
actual yield / predicted yield x 100
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What are allotropes?
allotropes are different forms of the same element with atoms arranged in different structures
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How does the limiting reactant affect a reaction?
the limiting reactant determines the maximum amount of product that can be made
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How does the collision theory explain rates?
........... increases the frequency of successful collisions and therefore the rate because ..................
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What is a catalyst?
a catalyst is a substance that changes the rate of a reaction without being used up to speed up reactions
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What happens when concentration is increased in a reaction?
the particles will be closer together and will collide more frequently so there will be many more successful collisions
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What happens when the temperature is increased in a reaction?
it causes an increase in the kinetic energy of the particles so they will move a lot faster and the rate of reaction will be faster
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What happens when the surface area of the reactants is increased?
if the surface area is larger the reaction speeds up. powdered solids have a larger surface area than lumps of solid so there are more particles on the surface for the reactants to collide with
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What is a limiting reactant?
a limiting reactant is the reactant not in excess that gets used up by the end of the reaction
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How do reactions take place?
they take place by particles colliding
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Other cards in this set

Card 2

Front

What do endothermic reactions do?

Back

they absorb energy from the surroundings and cause temperature drop

Card 3

Front

What factors affect the cost of making a drug?

Back

Preview of the front of card 3

Card 4

Front

What are the uses of Buckminister fullerene?

Back

Preview of the front of card 4

Card 5

Front

Why do all substances have high melting points?

Back

Preview of the front of card 5
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