$13.\_$ charts are utilized for visually estimating fugacity coefficients at various pressures and temperatures.

$14.$ The effect of temperature on fugacity is critical in designing $\_$ processes such as distillation.

$15.$ The activity coefficient at infinite dilution provides insight into the $\_$ interactions between solute and solvent.

$16.$ Thermodynamic consistency tests are essential for validating vapor$-$liquid equilibrium data and ensuring it adheres to the $\_$ principle.