The relationship between the boiling point of ethyl acetate and hexane, although there is no direct discussion of the two in ancient books, can be deduced from the reason of physical state change and physical property difference.

The human substance has its own properties, and the boiling point depends on the specific temperature at which the substance changes from liquid to gaseous state. Ethyl acetate has the properties of esters, and its intermolecular forces are van der Waals force and weak hydrogen bonds. Hexane belongs to alkane, and only van der Waals force is maintained between molecules.

The van der Waals force is related to molecular weight and molecular structure. Hexane carbon chain is longer, the molecular weight is larger, and the van der Waals force is stronger; however, ethyl acetate has polarity, although the molecular weight is slightly smaller, it is different from hexane due to polarity.

According to common sense, the boiling point is related to the difficulty of the molecule breaking free from the liquid phase. Ethyl acetate has different boiling points due to the different structures of polarity and hexane. Or, the experiment can show the details. Put the two in a suitable device and observe their boiling temperature, which must be different.

Observing the boiling point of a substance is very helpful for the separation and purification. If the two are mixed, according to the difference in boiling point, the method of distillation can be used to control the temperature to vaporize first, and then condense it into a liquid state, so that it can be divided. This is one end of the application of physical properties and is useful in all kinds of practice.