Capillary-condensed water in silica gel
Abstract
Capillary forces generate large negative pressures within liquid water adsorbed in silica gel. The molar volume of the capillary water increases as the relative pressure decreases. The pressure–volume behaviour of capillary-condensed water can be described by an equation of state proposed by Speedy in 1982. The influence of this behaviour on the estimation of pore-size distributions is briefly discussed.