The behaviour of a spilled substance that evaporates as well as dissolves depends on it’s vapour pressure (Pa) and solubility (kg/m3) at given conditions (temperature). The separation of evaporating and dissolving is considered to happen directly after the release. The following diagram gives an indication of the percentage evaporated and dissolved. By moving the globules on the horizontal lined the variables vapor pressure and solubility can be decreased or increased.

Evaporation / Dissolved

\(E=100-\left(\dfrac{109,7}{1+0,35\dfrac{P^{0,71}}{S^{1,09}}}\right)\)

\(D=\left(\dfrac{109,7}{1+0,35\dfrac{P^{0,71}}{S^{1,09}}}\right)\)

In which;

E amount evaporated (%of weight)

D amount dissolved (% of weight)

P vapour pressure (Pa)

S solubility (kg/m3)