Both water and hydrocarbon dewpoints are represented as the maximum solubility of each phase in the other. Prediction of hydrate formation is covered in Predicting hydrate formation. Because F 2, two intensive variables are needed to specify the system. At a given temperature and pressure, the user can determine the saturated water content of gases, the point at which a liquid water phase will precipitate. For this reason Figure 1 frequently is called the water dewpoint chart.