Which Type of Bond Must Be Broken for Water to Vaporize

Question

Which type of bond must be broken for water to vaporize?
A) ionic bonds
B) both hydrogen bonds and ionic bonds
C) polar covalent bonds
D) hydrogen bonds
E) both polar covalent bonds and hydrogen bonds

Accepted Answer

Water molecules are held together by hydrogen bonds, so these bonds must be broken in order for water to vaporize. Ionic bonds are not present in water molecules, and polar covalent bonds alone are not sufficient to cause the vaporization of water.