In order to introduce the critical temperature and the critical pressure of a working substance (WS), consider the pressure () - volume () plot diagramed in Figure 1, which highlights the change in volume with the application of pressure for a fixed mass of gas, found at different constant temperatures.
With wine, the acidity comes from the type of grapes used, the weather where they are grown, and how the wine is made. For cocktails, on the other hand, the acidity is decided by the bartender or the recipe. When helping a guest make a decision about their drink choice, get a sense of their taste for acidity.
The barstaff here are just lovely. Very attentive, and I love how knowledgeable they are on their product. I had friends in town, and the bartender at the lower bar explained all the fine details on Wisconsin beer, Old Fashioneds, etc. My friends had a great time learning all about it. The bartender even let them sample a bunch so they could get a feel for all the finer nuances of Wisco beer.