arrange the following in increasing order of boiling point ch3ch2oh ,ch3coch3 ,ch3cooh
Answers
Answer:
highest boiling point: Ch3CooH
least boiling point: Ch3COCH3
Explanation:
Boiling point of a compound depends upon intermolecular Hydrogen bonding..
more is the strong hydrogen bonding more will be the boiling point..
so, Maximum boiling point can be seen in acetic acid,
while boiling point is least in ketone ..
order of hydrogen bonding—
Ch3COCH3 <CH3CH2OH <CH3COOH
Order of boiling point—
Ch3CoCH3<CH3CH2OH<CH3COOH
Alcohols have higher boiling point than ketone because alcohol contain one -OH group unlike carbonyls
Alcohols have higher boiling point than ketone because alcohol contain one -OH group unlike carbonyls (ketone or aldehyde). They are capable of intermolecular hydrogen bonding as they have one H atom bonded to a hihly electronegative atom (F,Cl,O)which contains at least one lone pair.
Due to this strong hydrogen bonding,it will require high amount of energy to break alcohol bond.Hence,alcohol has higher boiling point than ketone
Due to this strong hydrogen bonding,it will require high amount of energy to break alcohol bond.Hence,alcohol has higher boiling point than ketone
why carboxylic acids have highest boiling point among them?
The boiling points of carboxylic acids are higher than the comparable molecular masses of aldehydes, ketones, and alcohols. The reason for such behaviour is the ability of carboxylic acids molecules to extensively associate with each other through intermolecular hydrogen bonding. As a result of which, the hydrogen bonds are not broken entirely and remain intact even during the vapour state.