  We modelled the aqueous solvation of a nonpolar solute as a function of the
radius, temperature and pressure. In this study a simple two-dimensional
Mercedes-Benz (MB) water model was used in NPT Monte Carlo simulations. This
model has previously been shown to qualitatively predict the volume anomalies
of pure water and the free energy, enthalpy, entropy, heat capacity, and volume
change in order to insert a nonpolar solute into water. Here, we extended the
studies of solvation of nonpolar solute to examine the pressure dependence and
broader range of temperature and size dependence. The model shows two different
mechanisms, one for the solvation of large nonpolar solutes bigger than water
and the second for smaller solutes.

Soft Condensed Matter