Syllabus section
Topic
14.5; 14.8
Condensation polymerisation
40-minute periods
Resources in Coursebook
Resources in Workbook
Resources on this CD-ROM
5
Section 11.4
Exercise 11.4 Condensation polymerisation
Worksheet 11.3 Condensation polymers
Exercise 11.5 The analysis of condensation polymers
Worksheet 11.5 Skin allergies
Activity 11.5 The nylon rope trick Activity 11.6 Chromatography of amino acids Questions 11.10 to 11.14 EOCQs 4, 5 Internet animations, linked from CD-ROM: Addition and condensation polymers
Topic 1
Exercise 11.6 Representing condensation polymerisation reactions
Worksheet 11.6 Enzymes in industry
Exercise 11.7 Small-scale molecular engineering
Petroleum
Coursebook section 11.1 (pp. 275–282)
Teaching ideas ◆
◆
Outline the process of fractional distillation of petroleum (crude oil), detailing the different fractions obtained and uses for each fraction. The ‘Alchemy’ resource from the Royal Society of Chemistry (UK) gives details and resources on a series of industrially important processes including ‘oil refining’ and the making of polythene and nylon: http://www.rsc.org/Education/Teachers/Resources/Alchemy/ Discuss the need for cracking of the longer-chain fractions from oil refining and consider various examples. Comment on the usefulness of all the products from the cracking process.
Common misunderstandings and misconceptions There are few misconceptions here but the complexity of the cracking process requires clear discussion, with straightforward examples being established before the more complicated possibilities are discussed. Note that the syllabus clearly states hydrogen as a possible product of the cracking process.
Homework ideas ◆ ◆ ◆
Coursebook questions 11.1 to 11.4 and End-of-chapter questions 2 and 3 Worksheet 11.1 Distillation of petroleum and cracking Work through Exercise 11.1 Essential processes of the petrochemical industry, Exercise 11.8 Meeting fuel demand and Exercise 11.9 Smooth running. These cover the processes of the industry and the economic demands on the industry.
Topic 2 Alternative fuels and energy sources Coursebook section 11.2 (pp. 282–284)
Teaching ideas ◆ ◆ ◆
Class discussion of alternative fuels could usefully take place here, to include topics such as biogas. There are various practical activities suggested here to reinforce the class discussions (e.g. Activity 11.3 Comparing fuels and Exercise 10.6 The chemistry of butanol). Discuss the economics of why, apart from the overall environmental concerns, it is advantageous for certain countries to develop alternative fuels. Original material © Cambridge University Press 2014
© Cambridge University Press 2014 IGCSE Chemistry
Teaching ideas: Chapter 11
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