Order-disorder process hypothesis

The important question remains is this second critical point the key to understanding the anomalies of water, or does the cooperation of the configurational excitations at some parameter or some thermodynamic field choice produce a critical point The cooperation of the configurational excitation is implied by the form of the heat capacity extracted by confined water, in particular, that of water confined in silica gel materials [128] at < = 1.1 nm. In this case, water remains in the liquid state at very low T and shows a Cp peak at approximately 227K (see, e.g.. Fig. 21). The hump at 227K supports the order disorder process hypothesis of water molecules in the liquid state. This silica gel sample —dH/dt does not give a water GT at this temperature, the 227K peak can be attributed to an order-disorder process, and the Tg is located at lower temperatures. 

---