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Spring Chemistry > Examples of chemical reactions > Flashcards

Examples of chemical reactions Flashcards

1
Q

What is combustion

A

Combustion is burning in oxygen

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2
Q

What 3 things are needed for combustion?

A

Fuel
Heating
Oxygen

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3
Q

What are hydrocarbons?

A

Fuels that contain only hydrogen and carbon

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4
Q

COMBUSTION EQUATION FOR HYDROCARBON
Hydrocarbon + oxygen =

A

carbon dioxide + water + energy

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5
Q

What is oxidation?

A

It is the gain on oxygen
When a substance reacts with oxygen, it’s called an oxidation reaction

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6
Q

Give examples of oxidation

A

Combustion
Rusting

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7
Q

Write a word equation for rusting

A

iron + oxygen —> iron oxide

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8
Q

Which one is the oxidation reaction: neutralisation, thermal decomposition or combustion?

A

combustion

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9
Q

What is thermal decomposition?

A

It is when you heat a substance and it breaks down

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10
Q
A

Thermal decomposition

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11
Q

Write a word equation if you heat copper carbonate

A
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12
Q

Which of the following reactions is also a combustion reaction: bike rusting, extracting a metal from a metal oxide or a bonfire

A

Bonfire

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13
Q

The picture shows a candle burning in oxygen. What type of reaction occurs when something burns in oxygen?

Thermal decomposition
Combustion
Rusting

A

Combustion

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14
Q
A

Heat
Light

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15
Q

What 2 gases are released when a candle burns?

A

Carbon dioxide
Water vapour

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16
Q

Chemical reactions result in a transfer of energy.
Compare the amount of energy stored in the products and reactants in an exothermic reaction

A

The products have less energy than the reactants

17
Q

Which of the following types of reaction is an example of an endothermic reaction?
Tick one box.
Combustion
Oxidation
Neutralisation
Thermal decomposition

A

Thermal decomposition

18
Q

How can you tell the reaction is endothermic?

A
19
Q

3
During a reaction between solutions of citric acid and sodium hydrogencarbonate, the temperature of the surroundings went down.
3.1 How can you tell the reaction is endothermic?

A

The temperature of the surroundings goes down

20
Q

During a reaction between solutions of citric acid and sodium hydrogencarbonate, the temperature of the surroundings went down.

Where is the energy transferred from in an endothermic reaction?

A

From the surroundings

21
Q

.3 What happens to the amount of energy in the universe after the reaction?

A

It stays the same

22
Q

What happens when Ethene burns in oxygen?( what is ethene)

A
23
Q
A
24
Q

What are precipitation reactions?

A

Chemical reactions where solutions react to form insoluble products are known as precipitation reactions.
What is meant by insoluble?
Lime scale forming in a kettle is an example of a precipitation reaction.
This is caused by the thermal decomposition of Calcium Bicarbonate in tap water turning into insoluble Calcium Carbonate - limescale.

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Spring Chemistry (4 decks)

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