* Liquid: At room temperature and normal atmospheric pressure, ethyl alcohol is a liquid. This is the state we typically encounter it in.
* Vapor: Ethyl alcohol can become a vapor (gas) when heated above its boiling point, which is 78.37 °C (173.07 °F). This is why we can smell the characteristic odor of alcohol when it evaporates from a glass or spills.
* Solid: At very low temperatures, below its freezing point of -114.1 °C (-173.4 °F), ethyl alcohol becomes a solid.
Therefore, ethyl alcohol is only a vapor when it's heated above its boiling point.
Here's why it easily vaporizes:
* Weak intermolecular forces: The molecules of ethyl alcohol are held together by relatively weak hydrogen bonds. This makes it easier for them to escape the liquid phase and become a vapor.
* High vapor pressure: Ethyl alcohol has a high vapor pressure, which means it readily evaporates at room temperature.
It's important to note that ethyl alcohol can exist as a vapor even at room temperature if the air is sufficiently humid. However, the concentration of alcohol vapor in the air will be much lower than when it's heated to its boiling point.
