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Lesson Sequence

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C1 part 1 C1 Lesson 21 Transistion Metals C1 Lesson 24 Crude oil and Alkanes
Year 9

Learning outcomes and Specification referenceEdit

C1.4.1 Crude oil C1 Lesson 22&23 Crude oil and Alkanes
a Crude oil is a mixture of a very large number of compounds. Know what a mixture is in terms of elements and compounds.
b A mixture consists of two or more elements or compounds not chemically combined together. The chemical properties of each substance in the mixture are unchanged. It is possible to separate the substances in a mixture by physical methods including distillation. Describe fractional distillation as based on each compound having a different boiling point.
c Most of the compounds in crude oil consist of molecules made up of hydrogen and carbon atoms only (hydrocarbons). Most of these are saturated hydrocarbons called alkanes, which have the general formula CnH2n+2 . Recognise alkanes from their molecular or structural formula.
Describe what the structural formula shows.
Know the general formula for alkanes.
C1.4.2 Hydrocarbons b The many hydrocarbons in crude oil may be separated into fractions, each of which contains molecules with a similar number of carbon atoms, by evaporating the oil and allowing it to condense at a number of different temperatures. This process is fractional distillation. Know that each compound vaporises and condenses at different temperatures, and so they are separated.
c Some properties of hydrocarbons depend on the size of their molecules. These properties influence how hydrocarbons are used as fuels. Describe the relationship between molecule size and boiling point, viscosity, ease of ignition, and flammability.

Full Specification TextEdit

C1.4.1 Crude oil

a) Crude oil is a mixture of a very large number of compounds.
b) A mixture consists of two or more elements or compounds not chemically combined together. The chemical properties of each substance in the mixture are unchanged. It is possible to separate the substances in a mixture by physical methods including distillation.
c) Most of the compounds in crude oil consist of molecules made up of hydrogen and carbon atoms only (hydrocarbons). Most of these are saturated hydrocarbons called alkanes, which have the general formula CnH2n+2.

C1.4.2 Hydrocarbons

b) The many hydrocarbons in crude oil may be separated into fractions, each of which contains molecules with a similar number of carbon atoms, by evaporating the oil and allowing it to condense at a number of different temperatures. This process is fractional distillation.
c) Some properties of hydrocarbons depend on the size of their molecules. These properties influence
how hydrocarbons are used as fuels.

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References to lessons and resources in commercial schemesEdit

Nelson ThornesEdit

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Harper CollinsEdit

Longman/PearsonEdit

HodderEdit

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