Water has unusually high viscosity . Water has unusually high heat of vaporization . Water shrinks on melting. The number of nearest neighbors increases on melting. The number of nearest neighbors increases with temperature.
Pressure reduces the temperature of maximum density.
Water shows an unusually large viscosity increase as the temperature is lowered. Water has unusually low compressibility. The compressibility drops as temperature increases down to a minimum at about 46.5 C. Below this temperature, water is easier to compress as the temperature is lowered. Water has over twice the specific heat capacity of ice or steam. Solutes have varying effects on properties such as density and viscosity.