Properties of Alkanes Nonpolar molecules – not water-soluble Relatively low melting and boiling points Generally less dense than water The longer the chain.

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Presentation transcript:

Properties of Alkanes Nonpolar molecules – not water-soluble Relatively low melting and boiling points Generally less dense than water The longer the chain (greater molecular weight), the higher the melting point, boiling point, and density.

NameMelting pt (°C) Boiling pt (°C) Density at 0°C (g/mL) Methane Gas Ethane Gas Propane Gas Butane Gas Pentane Hexane Heptane Octane Nonane Decane

Constitutional Isomers Molecules that have the same molecular formula but a different arrangement of atoms C 4 H 10 CH 3 CH 3 CH 2 CH 2 CH 3 CH 3 CHCH 3 butane2-methylpropane b.p. = -0.4°C, b.p. = -12°C m.p. = -139°Cm.p. = -145°C

Website to practice building isomers bin/senese/tutorials/isomer/ind ex.cgi Copy down your work into your notebook! Name the isomers that are built for butane, pentane, hexane, and heptane.

Homework Page 306: 11.3 & 11.4 Page 308-9: 11.5 & 11.6 Page : 19, 22, 28, 30, 32, 34, 36 DUE: