Does whiskeY evaporate if in a decanter?

Yes, whiskey will evaporate if left in a decanter, though the rate of evaporation is relatively slow. This phenomenon is known as "the angels' share".

Here's why:

* Whiskey is a mixture of water and alcohol, both of which are volatile. This means they have a tendency to change from a liquid to a gas.

* The open surface area of a decanter allows for more contact with air. This speeds up the evaporation process.

* The temperature and humidity of the environment also play a role. Warmer temperatures and lower humidity will cause faster evaporation.

While the angels' share is a natural part of the aging process, it's not something to be overly concerned about. A small amount of whiskey evaporates over time, which is why some decanters are sealed with a stopper. However, it won't significantly impact the flavor or quality of your whiskey in a reasonable timeframe.

Fun fact: It's estimated that about 2% of a barrel's contents evaporate during the aging process!