What is metastable state of water?
Metastable States One example is water, cooled below the zero temperature. This supercool water can stay liquid, but not for a long time, and it then freezes abruptly. Such states are called metastable. They are not equilibrium states; at negative temperatures the only equilibrium state of water is ice.
What is stable and metastable?
Stable VS. Metastable. The distinction between stable and metastable equilibrium is generally that the stable equilibrium state is “truly unchanging”, or unchanging given in- definite time, whereas the metastable state may be changing, but too slowly to be observed (see Quota- tions).
What is meant by metastable phase?
[¦med·ə′stā·bəl ¦fāz] (physical chemistry) Existence of a substance as either a liquid, solid, or vapor under conditions in which it is normally unstable in that state.
How metastable state is created?
The principle, formulated by the Danish physicist Niels Bohr about 1920, is an application of the laws of quantum mechanics to the properties of electrons subject to the electric field created by the positive charge on the nucleus of an atom and the negative charge on other electrons that are bound to the nucleus.
Is there such a thing as metastable water vapor?
Or maybe they do, but are valid only for a system entirely composed of water and not water + air. This last guess seems to be correct, I am right? Metastable water vapor exists as supercooled vapor or in supersaturated air e.g. in the absence of cloud condensation nuclei.
How is water pollution harmful to the environment?
Water pollution occurs when harmful substances—often chemicals or microorganisms—contaminate a stream, river, lake, ocean, aquifer, or other body of water, degrading water quality and rendering it toxic to humans or the environment.
Which is the best description of transboundary pollution?
Transboundary pollution is the result of contaminated water from one country spilling into the waters of another. Contamination can result from a disaster—like an oil spill—or the slow, downriver creep of industrial, agricultural, or municipal discharge.
Which is the best definition of water pollution?
Water pollution is any contamination of water with chemicals or other foreign substances that are detrimental to human, plant, or animal health.