Do alcohols have high or low boiling points?
The boiling points of alcohols are much higher than those of alkanes with similar molecular weights. For example, ethanol, with a molecular weight (MW) of 46, has a boiling point of 78 °C (173 °F), whereas propane (MW 44) has a boiling point of −42 °C (−44 °F).
Why do alcohols have a higher boiling point than alkenes?
In alkanes, the only intermolecular forces are van der Waals dispersion forces. Hydrogen bonds are much stronger than these; therefore, more energy is required to separate alcohol molecules than to separate alkane molecules. This is the main reason for higher boiling points in alcohols.
Why do primary alcohols have higher boiling points?
From my understanding, for homologous alcohols, primary alcohols have the highest boiling points, because the OH group is the most accessible for other molecules to hydrogen bond to, therefore stronger intermolecular forces result in higher mp/bp.
Which alcohol is most viscous?
Ethylene glycol is more viscous than ethyl alcohol because ethylene glycol contains two O-H groups (ethyl alcohol contains one O-H group). This results in stronger hydrogen bonding between ethylene glycol molecules.
Which alcohol is the most acidic?
Therefore, in the gas-phase, t-butanol is the most acidic alcohol, more acidic than isopropanol, followed by ethanol and methanol. In the gas phase, water is much less acidic than methanol, which is consistent with the difference in polarizibility between a proton and a methyl group.
Are all alcohols soluble in water?
Moreover, in alcohols, the −OH group is polar and makes them water-soluble. On the other hand, the alkyl chain is non-polar and decreases the solubility of alcohol in water.
Why ethanol has a higher boiling point than methanol?
Ethanol has higher boiling point than Methanol. Boiling point of alcohol increase as the number of carbons increase. The factors affecting the boiling/melting points of alcohols are not only hydrogen bonds, but also van der Waals dispersion forces and dipole-dipole interactions.
Which compound has the highest boiling point?
Propionamide has the strongest intermolecular forces, It should have the highest boiling point.