Petrol and ethene are both obtained from crude oil. a. Name the process by which petrol is obtained from crude oil. b. i. Name the process by which ethene is obtained from the hydrocarbons extracted from crude oil. ii. Write a chemical equation for the production of ethene from this process, using octane, C8H18, as the hydrocarbon. c. A chemistry book describes the properties of ethene as being: - unsaturated - a flammable gas - able to participate in addition reactions i. What is meant by unsaturated? ii. Write a balanced equation to show the burning of ethene in a large excess of air. iii. Write a chemical equation to show ethene undergoing an addition reaction.

SSCE VCE Chemistry Reactions of Organic Compounds: Petrol and ethene are both obtai

Petrol and ethene are both obtained from crude oil - VCE - SSCE Chemistry - Question 7 - 2002 - Paper 1

Question 7

Petrol and ethene are both obtained from crude oil. a. Name the process by which petrol is obtained from crude oil. b. i. Name the process by which ethene is obta... show full transcript

Worked Solution & Example Answer:Petrol and ethene are both obtained from crude oil - VCE - SSCE Chemistry - Question 7 - 2002 - Paper 1

Step 1

a. Name the process by which petrol is obtained from crude oil.

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Answer

The process by which petrol is obtained from crude oil is called fractional distillation.

Step 2

b. i. Name the process by which ethene is obtained from the hydrocarbons extracted from crude oil.

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Answer

The process by which ethene is obtained from hydrocarbons is known as cracking.

Step 3

ii. Write a chemical equation for the production of ethene from this process, using octane, C8H18, as the hydrocarbon.

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Answer

The chemical equation for the production of ethene (C2H4) from octane (C8H18) can be represented as:

$C_8H_{18} \rightarrow C_2H_4 + C_6H_{14}$

Step 4

c. i. What is meant by unsaturated?

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Answer

Unsaturated refers to organic compounds that contain at least one double bond or triple bond between carbon atoms. In the case of ethene, it has a double bond which makes it unsaturated.

Step 5

ii. Write a balanced equation to show the burning of ethene in a large excess of air.

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Answer

The balanced equation for the complete combustion of ethene (C2H4) in a large excess of air (oxygen) is:

$C_2H_4 + 3O_2 \rightarrow 2CO_2 + 2H_2O$

Step 6

iii. Write a chemical equation to show ethene undergoing an addition reaction.

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Answer

An example of ethene undergoing an addition reaction is its reaction with hydrogen to form ethane:

$C_2H_4 + H_2 \rightarrow C_2H_6$

This equation represents the hydrogenation of ethene.

Petrol and ethene are both obtained from crude oil - VCE - SSCE Chemistry - Question 7 - 2002 - Paper 1

Worked Solution & Example Answer:Petrol and ethene are both obtained from crude oil - VCE - SSCE Chemistry - Question 7 - 2002 - Paper 1

a. Name the process by which petrol is obtained from crude oil.

b. i. Name the process by which ethene is obtained from the hydrocarbons extracted from crude oil.

ii. Write a chemical equation for the production of ethene from this process, using octane, C8H18, as the hydrocarbon.

c. i. What is meant by unsaturated?

ii. Write a balanced equation to show the burning of ethene in a large excess of air.

iii. Write a chemical equation to show ethene undergoing an addition reaction.

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