Liquid water boils and changes into a gas, usually called steam or water vapor at 100 o C. In all three states the same molecules of water (H 2 O) are present. Carbon dioxide boils at -78.5 o C. In the graphic on the left a block of dry ice as a solid is changing to the gaseous state. The molecules of CO 2 are ...

The disadvantages to using liquid media are that it can be costly and difficult to work with. Define the term, technique, and its relation to media. Why is the technique and media used important?