The intermolecular Hydrogen-bonds between CH3CH2OH and H2O are very strong because H atoms are bound to the electronegative O atoms. Therefore, their boiling points are higher.
Since hydrogen is covalently linked to the more electronegative atom oxygen in the molecule CH3OH, hydrogen bonding is present in this compound.
In fact, it results from the fact that whereas each molecule of H2O can generate up to four intermolecular hydrogen bonds, the same molecule of CH3OH can only form up to three.
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