Energy and Reactions GCSE Chemistry AQA (higher)

This is C2.5 in the AQA revision book.
As this is a very short topic, there are only 17 questions in this quiz.

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When chemical reactions take place, energy is transferred as...........
bonds are made and broken
1 of 14
What do we call reactions that transfer energy to the surroundings?
exothermic
2 of 14
The energy transferred in this reaction often heats up the surroundings, so the temperature
increases
3 of 14
What do we call reactions that take in energy from the surroundings?
endothermic
4 of 14
Some of these reactions cause.....
a decrease in temperature
5 of 14
Other examples of these reactions require...
an energy supply
6 of 14
Why do some sweets cause a cooling effect in your mouth?
Because this causes an endothermic reaction
7 of 14
A reversible reaction that is endothermic in one way, must be.............in the other
exothermic
8 of 14
Increasing the temperature...........the amount of products from the endothermic reaction.
increases
9 of 14
Decreasing the temperature..........the amount of products from the exothermic reaction.
increases
10 of 14
This means that we can change the......of the reaction by changing the temperature.
yield
11 of 14
For reversible reactions involving gases, increasing the pressure..........the yield of the reaction that produces the smaller number of gas molecules.
increases
12 of 14
The conditions for industrial processes are chosen to give as much product as possible, as quickly as possible.....
for the lowest cost
13 of 14
the reaction to produce ammonia is.............
exothermic
14 of 14

Other cards in this set

Card 2

Front

What do we call reactions that transfer energy to the surroundings?

Back

exothermic

Card 3

Front

The energy transferred in this reaction often heats up the surroundings, so the temperature

Back

Preview of the front of card 3

Card 4

Front

What do we call reactions that take in energy from the surroundings?

Back

Preview of the front of card 4

Card 5

Front

Some of these reactions cause.....

Back

Preview of the front of card 5
View more cards

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