The Plot Form

Purpose: Exploring Numerical Data in Graphical Form.

Terminology:

• Property (thermophysical property shown on the Y axis)
• Display Variable (state variable shown on the X axis)
• Background Variable (state variable not shown on the X axis for multivariable states)

Plot form types:

• Data as a function of 1 variable (e.g., vapor pressures or densities at saturation pressure)
• Data as a function of 2 or more variables (e.g., densities or viscosities for a single phase)
• Singular properties (no state variables) (e.g., critical properties of pure compounds)
• Pure-compound consistency plots (e.g., vapor pressures or saturated-phase densities)
• Multi-property plots (e.g., SLE, LLE, VLE diagrams for binary mixtures)
• Triangle plot (SLE, LLE, VLE for ternary mixtures)
• VLE consistency plots (special plots for VLE of binary mixtures)

The first 6 types are interactive through the toolbar or by right-clicking on the plot area or a data point. The last type is static to display Consistency Test results.

For plots of pure compounds, some special tools are available for Data Exploration and Printing on the plot.

Some Special Binary Plot Features for display of isobaric and isothermal phase-equilibrium data are available. These are particularly useful in display of Vapor-Liquid Equilibrium (VLE) data.