Chemistry C3

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Why is graphite a good lubricant?
It has layers of carbon particles. These layers slide over each other.
1 of 10
Give 3 examples of exothermic reactions.
Combustion, respiration, burning & reactions between metals and acids.
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What does 'exothermic' mean?
A reaction which lets our heat.
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Give 3 examples of carbon structures.
Carbon-60 (buckminster fullerine/C60), diamonds & graphite.
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What is batch production?
Production in small amounts.
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How do you work out percentage yield?
actual yield/predicted yield X 100
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Why does increasing concentration increase reaction rates?
There are more particles in the same volume and that means an increaed success rate.
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Why does increasing the temperature increase reaction rates?
The heat gives particles more energy which means particles move faster and therefore have an increased rate of successful collisions.
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Why does using powders instead of small solids increase reaction rates?
The powder has a larger surface area which means more particles are exposed and ready to react.
9 of 10
What are allotropes?
Different structures of the same particles.
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Other cards in this set

Card 2

Front

Give 3 examples of exothermic reactions.

Back

Combustion, respiration, burning & reactions between metals and acids.

Card 3

Front

What does 'exothermic' mean?

Back

Preview of the front of card 3

Card 4

Front

Give 3 examples of carbon structures.

Back

Preview of the front of card 4

Card 5

Front

What is batch production?

Back

Preview of the front of card 5
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