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C5 Energetics Revision

Last updated about 1 month ago

19 questions

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Question 1

1.

What happens to energy in an endothermic reaction?

Energy stays the same throughout the reaction.

Energy is released into the surroundings.

Energy transforms into a different type.

Energy is absorbed from the surroundings.

Question 2

2.

In an endothermic reaction, how does the temperature change?

The reaction has no temperature change.

The temperature s increases.

The temperature decreases.

Question 3

3.

Question 4

4.

What do exothermic reactions release during the reaction?

Energy in the form of heat

Solid products only

Energy in the form of light

Electricity for powering devices

Question 5

5.

In an exothermic reaction, how does the temperature change?

Temperature remains the same

The temperature increases.

The temperature decreases

Question 6

6.

Question 7

7.

What do catalysts do in a chemical reaction?

Slow down the reaction rate.

Speed up the reaction without being used up.

Change the chemical products created.

Start the reaction process only.

Question 8

8.

Why are catalysts important in reactions?

They prevent all reactions from occurring.

They create waste products in reactions.

They make processes faster and more efficient.

They reduce the need for energy sources.

Question 9

9.

Question 10

10.

Question 11

11.

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Question 14

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Question 15

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Question 16

16.

True

False

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Question 17

17.

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Question 12

12.

What happens to particles in a solid when energy is added?

They disappear completely.

They become liquid instantly.

They vibrate faster and spread apart.

They freeze and are unmovable.

Question 13

13.

How do particles behave in a gas compared to a liquid?

Gas particles are tightly packed.

Gas particles move freely and spread apart.

Gas particles vibrate in place.

Gas particles are heavier than liquids.

Question 18

18.

Question 19

19.