Organic molecules - Alkanes

Presentation

•

Chemistry

•

11th Grade

•

Practice Problem

•

Medium

•

NGSS

MS-PS1-1

Standards-aligned

Sajini De Alwis

Used 21+ times

FREE Resource

7 Slides • 6 Questions

Organic molecules - Alkanes

Success Criteria:

- I know what Alkanes are.

- I can list and draw the first 10 Alkane molecules.

- I can draw the Lewis structure, structural and condensed formulae of the first 10 Alkanes.

Organic Compounds

- Compounds of primarily Carbon and Hydrogen atoms.

- Hydrocarbons (compounds of exclusively Carbon and Hydrogen) are the simplest of all organic compounds.

Multiple Choice

Hydrocarbons are compounds that contain

Carbon, only

Carbon and Hydrogen, only

Carbon, Oxygen, and Hydrogen, only

Carbon, Oxygen, Hydrogen, and Nitrogen, only

Hydrocarbons

- Smallest hydrocarbon: Methane CH₄

Alkanes

A particular type of Hydrocarbon with NO double or triple bonds between carbon atoms.

Alkanes have the general formula CnH2n+2

Multiple Choice

General formula of Alkane is

C_nH_2n+1OH

C_nH_2n+1COOH

C_nH_2n+2

C_nH_2n

Structure of the smallest alkanes: a homologous series

Multiple Choice

How many carbon atoms are in propane?

Multiple Choice

How many hydrogen atoms are in butane?

Different types of formulae:

The molecular formula: the number of each atom present in the molecule (CnH2n+2)

The semistructural/condensed formula: shows how the atoms are bonded to each carbon atom.

The structural formula: arrangement of carbon and hydrogen atoms.

State the Molecular formula, Condensed formula and Structural formula for Alkanes 5 - 10.

Pentane (C5H12)
Hexane (C6H14)
Heptane
Octane
Nonane
Decane

Multiple Choice

Give the name of this compound...

C₃H_8?

Pentane

Hexane

Propane

Butane

Multiple Choice

The molecular formula for Heptane is..

C₄H₁₀

C₅H₁₂

C₈H₁₈

C₇H₁₆

Alkanes from Methane to Butane are all gases (found in natural gases) at room temperature.

Heavier Alkanes from Pentane to Decane are liquids at room temperature.

All Alkanes are Non-polar - Dispersion forces hold these molecules together.

Organic molecules - Alkanes

Success Criteria:

- I know what Alkanes are.

- I can list and draw the first 10 Alkane molecules.

- I can draw the Lewis structure, structural and condensed formulae of the first 10 Alkanes.

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