lecture 6 - Organic Lecture Series CH 310/318 M LECTURE 6...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Organic Lecture Series 1 CH 310/318 M LECTURE 6 Textbook Assignment: Chapter 3 Today’s Topics: Physical properties of Alkanes & intro to Physical properties of Alkanes & intro to Chirality Chirality Notice & Announcements: 2nd Problem set posted Topic Guide posted to WEB site Organic Lecture Series 2 Alkanes and Alkanes and Cycloalkanes Cycloalkanes Chapter 2 Chapter 2
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Organic Lecture Series 3 Physical Properties of Alkanes Physical Properties of Alkanes • Intermolecular forces of attraction (example) – ion-ion (Na + and Cl - in NaCl) – ion-dipole (Na +…. . OH 2 and Cl -…. . H-O-H solvated in aqueous solution) – dipole-dipole and hydrogen bonding – dispersion forces (very weak electrostatic attraction between temporary dipoles) Organic Lecture Series 4 • Low-molecular-weight alkanes (methane to butane) are gases at room temperature. • Higher molecular-weight alkanes (pentane, decane, gasoline, and kerosene) are liquids at room temperature. • High-molecular-weight alkanes (paraffin wax) are semisolids or solids at room temperature. Physical Properties Physical Properties
Background image of page 2
Organic Lecture Series 5 • Constitutional isomers have different physical properties. Name Density (g/mL) hexane 2-methylpentane 3-methylpentane 2,3-dimethylbutane 2,2-dimethylbutane 68.7 60.3 63.3 58.0 49.7 -95 -154 -118 -129 -98 0.659 0.653 0.664 0.661 0.649 bp (°C) mp (°C) Hexane 2,2-Dimethylbutane Physical Properties of Alkanes Physical Properties of Alkanes Organic Lecture Series 6 Oxidation of Alkanes Oxidation of Alkanes • Oxidation is the basis for the use of alkanes as energy sources for heat and power. – heat of combustion: heat of combustion: The heat released when one mole of a substance in its standard state is oxidized to carbon dioxide and water. CH 4 2O 2 3 2 3 5O 2 CO 2 3CO 2 4H 2 O 2H 2 O + + -890.4 (-212.8) ++ -2220 (-530.6) Methane Propane Δ H 0 kJ (kcal)/mol
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Organic Lecture Series 7 Stereoisomerism Stereoisomerism and and Chirality Chirality Chapter 3 Chapter 3 Organic Lecture Series 8 • Isomers: Isomers: Different compounds with the same molecular formula. • Constitutional isomers: Constitutional isomers: Isomers with a different connectivity.
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 17

lecture 6 - Organic Lecture Series CH 310/318 M LECTURE 6...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online