This modern refrigeration and air conditioning 19th edition pdf free is about water ice. Unsourced material may be challenged and removed. Frozen water in the form of an ordinary household ice cube. The white zone in the center is the result of tiny air bubbles.
An unusual property of ice frozen at atmospheric pressure is that the solid is approximately 8. Liquid water is densest, essentially 1. This is due to hydrogen bonding dominating the intermolecular forces, which results in a packing of molecules less compact in the solid. Density of ice increases slightly with decreasing temperature and has a value of 0. It is also a common cause of the flooding of houses when water pipes burst due to the pressure of expanding water when it freezes.
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This creates a sheltered environment for bacterial and algal colonies. Compared with water, this absorption is shifted toward slightly lower energies. Thus, ice appears blue, with a slightly greener tint than liquid water. Since absorption is cumulative, the color effect intensifies with increasing thickness or if internal reflections cause the light to take a longer path through the ice. Other colors can appear in the presence of light absorbing impurities, where the impurity is dictating the color rather than the ice itself.