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CHEMISTRY S2 > Module 2 > Flashcards

Module 2 Flashcards

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1
Q

What is a fuel?

A

A substance which is burned to release enrgy

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2
Q

What is another word for combustion?

A

Bruning

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3
Q

What does a substance react with when it burns?

A

Oxygen

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4
Q

What is the test for oxygen?

A

Relights a glowing splint

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5
Q

How is carbon dioxide made?

A

Carbon reacts with oxygen

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6
Q

What is the test for carbon dioxide?

A

Turns lime water cloudy

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7
Q

When is carbon monoxide produced?

A

When carbon burns in an insufficient supply of oxygen

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8
Q

What is carbon monoxide?

A

A toxic gas

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9
Q

How is water produced?

A

Hydrogen reacts with water

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10
Q

What is the test for hydrogen?

A

Burns with a squeaky pop

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11
Q

What is hydrogen being hailed as?

A

A fuel of the future

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12
Q

What is coal, oil, and natural gas?

A

Fossil fuels

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13
Q

How were coal, oil, and gas formed?

A

They were formed from the remains of plant and animal organisms that lived millions of years ago

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14
Q

What do oil and gas burn to produce?

A

Carbon Dioxide and Water

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15
Q

What do crude oil and natural gas mainly consist of?

A

Compounds called hydrocarbons

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16
Q

What do Hydrocarbons contain?

A

Hydrogen and carbon only

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17
Q

What is crude oil?

A

A I mixture of hydrocarbons

18
Q

What is fractional distillation?

A

A process used to separate substances with different boiling points

19
Q

What is fractional distillation used for?

A

To separate crude oil into fractions

20
Q

What is a fraction?

A

A group of hydrocarbons all with boiling points within a specific range

21
Q

What do fractions differ in?

A

Boiling points, viscosity, and flammability

22
Q

What can the property of fractions be related to?

A

The size of molecules in the fraction

23
Q

What are 2 pollution problems associated with burning fossil fuels?

A

Acid rain, and global warming

24
Q

What does carbon dioxide contribute to?

A

Global warming

25
Q

When is acid rain caused?

A

When gasses such as sulphur dioxide and nitrogen dioxide dissolve in water in the atmosphere

26
Q

What does acid rain do?

A

Kills fish in rivers, erodes buildings, and destroys plant life

27
Q

When is sulphur dioxide produced?

A

When some fossil fuels are burned

28
Q

How is nitrogen dioxide made?

A

The sparking of air in a petrol car engine

29
Q

How can pollution from burning fossil fuels be reduced?

A

Lean-burn engines, catalytic converters, low-sulphur petrols

30
Q

What is photosynthesis?

A

The process which plants make carbohydrates, from carbon dioxide and water, using light energy in the presence of chlorophyll

31
Q

Why are Carbohydrates an important food for animals?

A

Because they provide energy

32
Q

What do carbohydrates do?

A

They release energy, producing carbon dioxide and water when burned.

33
Q

What elements are present in carbohydrates?

A

Carbon, Hydrogen, and Oxygen

34
Q

What is the word equation for photosynthesis?

A

Carbon Dioxide + Water = Glucose + Oxygen

35
Q

What is the word equation for respiration?

A

Glucose + Oxygen = Carbon Dioxide + Water

36
Q

How are alcoholic drinks made?

A

From any fruit or veg which contains starch or sugars

37
Q

What is an enzyme?

A

A biological catalyst

38
Q

What is the catalyst for the alcohol reaction?

A

An enzyme in yeast

39
Q

What can make an alcoholic drink vary?

A

The plant source of carbohydrate

40
Q

What is the word equation for the production of alcohol from carbohydrates?

A

yeast
Glucose————>Ethanol+Carbon Dioxide

41
Q

What is Distillation used to increase?

A

The alcohol concentration of the products from fermentation

CHEMISTRY S2 (2 decks)

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