For most liquids other than water and substances with polyhydroxy groups, the thermal conductivity decreases with an increase in temperature. Water shows an anomalous effect. The conductivity, \(k\), first increases with temperature (up to \(420 \mathrm{~K}\) ) and then decreases with further increases in temperature. Provide some arguments to justify these observations.

The effect of temperature is small and often ignored, or a linear relation with temperature is used.