<span>The inter-molecular forces present in NH2NH2 is hydrogen bonding and CH3CH3 is London dispersion force. Between the two given compounds, the substance with the higher boiling point is NH2NH2 as hydrogen bonding is a much stronger force than London dispersion force.</span>
Within a molecule, atoms are linked by intramolecular forces. These forces are those that must be overcome in order for a chemical change to occur. These forces determine the chemical properties of substances.
However, there are other intermolecular forces that act on different molecules or ions and make the sensors attract or repel each other. These are what determine the physical properties of substances. They are usually weak but their contribution is important.
In the exercise both substances exist London dispersion forces and dipole-dipole forces and hydrogen bridges in NH2NH2. The substance with the highest boiling point is NH2NH2.
