Physics Can you explain

From the thermodynamic perspective, the degrees of freedom of motion classically contribute to the heat capacity of a thermodynamic system. As the temperature approaches absolute zero, the specific heat capacity of a system also approaches zero. Water has a higher degree of freedom than ice. [vibrational and translational movement] In fact, water has the second highest specific heat capacity of all known substances, after ammonia. A water molecule can form a maximum of four hydrogen bonds because it can accept two and donate two hydrogen atoms. Water has a high specific heat. This is caused by hydrogen bonds being broken as the water is heated and absorbing a great deal of heat energy in the process. This heat is returned when water is cooled and the bonds form back. In ice you don't get the breaking of bonds, you just get the ordinary thermal effects so it acts much more normally.

From another perspective, water, as a liquid, has more directions to move and can absorb more heat energy applied to it. There is more surface area that needs to be heated for the overall temperature to increase. However, ice has a rigid lattice structure, in a tetrahedral crystalline form. The surface area doesn't change due to its more rigid structure. As ice is heated, that heat energy must go somewhere, and it begins to break down the structure of the solid and melt the ice into water. It takes longer to heat water to a higher temperature than it does to melt ice.

Molecules in ice are in crystalline form. They are bounded by crystal lattices and hence the molecular motion is very limited. Molecules in water, however, have limited translational motion.

With the decrease of temperature, only the vibrational energy of molecules would be reduced. But in water, both vibrational and translational energies are reduced. This explains why more heat needs to be removed from water than from ice when the temperature is lowered by one degree Celsius.