Intro to organic chem

Question 1

How does chain length affect the boiling point of alkanes?

Answer 1

• as chain length increases, bp increases
• greater surface area of contact so stronger london forces and larger molecule so greater temporary dipoles, increased london forces
• more branched molecule, lower bp, less surface area of contact

Question 2

sigma bond

Answer 2

a bond formed by the overlap of one orbital from each bonded atom, consisting of a pair of electrons, and with the electron density centred around a line directly between the nuclei of the bonded atoms