Flashcards in Chapter 12- Alkanes Deck (5)
Define an alkane
A saturated hydrocarbon containing only carbon and hydrogen atoms joined together by single covalent bonds
What is a sigma bond?
The result of the overlap of two orbitals, one from each bonding atom
What is the shape of an alkane ?
Tetrahedral with a bond angle of 109.5 due to repulsion by the four electron pairs around the carbon atom
Why does the boiling points of alkanes increase as their chain length increases?
As chain length increases the molecules have a larger surface area so more surface contact possible=greater London forces = more energy required to overcome these forces