Water ... How much of this word.Sometimes so much so that it would be desirable to correct a poet!Indeed, the water - a synonym for life.This statement is true for the inhabitants of the coast of the ocean, and for the inhabitants of the desert.Properties of water for millennia science explored the length and breadth.It would seem that nothing is left unknown, but let's see ... with, like, the easiest option as the freezing temperature of water.
Everyone knows that the boiling point and freezing point of water are the key points selected in 1742 Anders Celsius to create your own temperature scale, and later adopted by most countries.But is the water boils at a hundred degrees and freezes at zero?No not always.There are many options that can change these numbers.Let's start from the beginning.
First, the freezing point of water is zero degrees at normal atmospheric pressure, for which the pressure is considered to be seven hundred and sixty millimeters of mercury.By lowering the pressure of the freezing temperature of water increases, and the boiling point - is reduced.When the pressure - all exactly the opposite.
Secondly, the high salt content makes water more "resistant" to the cold.The freezing point of salt water seas and oceans - about two degrees below zero Celsius.Those sea where salinity higher than average, freeze at a still lower temperature.
is well-known natural water - heterogeneous substance.Yes, the lion's share (more than ninety-nine percent) of water falls on the chemical compound, which is denoted by the formula H2O.But there is a part of natural water and even the so-called "heavy" water, and even "super-heavy".In the first case in the water molecule instead of two hydrogen atoms present its two atoms of deuterium isotope, in the second case - tritium.Under normal conditions of deuterium and tritium in water is too small to have a negative impact on humans or animals.But pure deuterium exhibits low toxicity properties.But tritium, a radioactive substance being in a concentrated form is dangerous.But, fortunately, in nature it is only found in a dispersed form.
Tritium and deuterium water has physical and chemical properties different from the usual, "our" water.Deuterium water freezes at 3.81 degrees C (at atmospheric pressure) and boils at 101.43 degrees.In tritiated water, these figures differ only slightly: the freezing point and boiling point 1.25 101.6 degrees Celsius.
properties of water, this seemingly simple chemical compound studied is far from full.Japanese Masaru learned, he said, even talk of water.He believed that the water reacts to music and the energy inherent in the words.And even on the note!It can be clearly seen after the alleged freezing of water in the form of the resulting crystals.It is interesting to note that the words "fool" and playing songs in the style of «heavy metal» water reacts the same, but the words "thank you" she is associated with a series of works for the harpsichord "Goldberg Variations" by Johann Sebastian Bach.
