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GCSE Chemistry > C3.2 - Energetics + C3.3 - Types Of Chemical Reaction > Flashcards

C3.2 - Energetics + C3.3 - Types Of Chemical Reaction Flashcards

1
Q

What is an exothermic reaction?

A

A reaction where the temperature of the reaction mixture increases
Energy is released into the surroundings

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2
Q

What are some examples of exothermic reactions?

A

Combustion
Neutralisation

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3
Q

What is an endothermic reaction?

A

A reaction where the temperature of the reaction mixture decreases
Takes in energy from the surroundings

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4
Q

What are some examples of endothermic reactions?

A

Photosynthesis
Melting

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5
Q

What is activation energy?

A

The minimum energy required for a reaction to start

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6
Q

What is bond energy?

A

The energy required to break 1 mol of a particular bond

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7
Q

What is a redox reaction?

A

A redox reaction is a reaction in which oxidation and reduction occur at the same time

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8
Q

What is reduction (electrons)?

A

The gain of electrons

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9
Q

What is oxidation (electrons)?

A

The loss of electrons

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10
Q

What is reduction (oxygen)?

A

The loss of oxygen from a substance

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11
Q

What is oxidation (oxygen)?

A

The gain of oxygen by a substance

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12
Q

What is a reducing agent ?

A

A substance in a reaction that oxidises so that another substance can be reduced

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13
Q

What is an oxidising agent?

A

A substance in a reaction that reduces so that another substance can be oxidised

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14
Q

What is a base?

A

A substance that can neutralise an acid

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15
Q

What is an alkali?

A

A soluble base

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16
Q

What ions do acids release when dissolved in water?

A

Hydrogen

17
Q

What ions do alkalis release when dissolved in water?

A

Hydroxide

18
Q

What is the neutralisation word equation?

A

Acid + base —> salt + water

19
Q

What is the word equation for acid and carbonate reactions?

A

Acid + carbonate —> salt + water + carbon dioxide

20
Q

What is a dilute acid?

A

An acid that contains a low ratio of acid to volume of solution

21
Q

What is a concentrated acid?

A

An acid that contains a high ratio of acid to volume of solution

22
Q

What is a weak acid?

A

An acid that partially ionises in a solution (a small fraction of their molecules release hydrogen ions)

23
Q

What is a strong acid?

A

An acid that fully ionises in a solution (all of their molecules release hydrogen ions)

GCSE Chemistry (8 decks)

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