which of the following accounts for the unusually high boili

which of the following accounts for the unusually high boiling point of water?

Solution

Water is a polar molecule.
It is made of two Hydrogen atoms and an Oxygen atoms. Oxygen is a more electronegative atom, (i.e. It has a stronger attraction for electrons) thus it tends to pull electrons away from the hydrogens. This means the electrons spend more time around the Oxygen atom, giving it a slight negative charge, while the Hydrogens are left with a slight positive charge. Because unlike electrical charges attract, one molecule of water is attracted to another (i.e. The positive hydrogen of one H2O molecule is attracted to the negative oxygen atom of another H2O molecule) forming a hydrogen bond. Because of this bond it takes more heat energy to overcome these bonds and turn the liquid of H2O into a gas.