Question

11. Order the following from highest vapor pressure to lowest by ordering the expected strength of the intermolecular forces. Molecule Dominant form of intermolecular force Ranking of vapor pressure (1 = highest, 5 = lowest) CHA CH3OH H20 HO-CH2-CH2-OH H3C-O-CH3

Answer 1

Custa laleaker the intermolecular forces, higher will be the vapous pressure, chy - No dipole moment, itt a non polar molecule so in Chy only vandtwaal force of attraction exists. So it has high vapour pressure. Choon - Methanol have a on group so it has very little clipale momena containg containing a little n-bonding. Monca vapour pressure decreases. 120 - Water contains strong net dipole moment and extensive hobondin. 30 vapour bressure is very low. 10- CH₂ - Unyon - It contains two hydroxy groups, do it also have strong ha bonding and cu size u large so It also contain wander- waal forces also. Il vapour pressure will be lowest. en-O-CH2 - It also contains Only vanderwaals forces of attraction but A greater than Cly, so it's Vapour pressure will be lower man Chy, so order will be any > Hic -o- CH₂ > CH₃OH > H₂O > H₂ CH₂ ио .