water - as usual attribute of our everyday life, it is probably difficult to find a person who, not having the professional grounds, thought about its physical and chemical properties.But then, if it is necessary to make it in this context, it is quite common to hear the argument that this problem - is of little interest for the reason that of the water a long time ago and found all know the level of axioms.However, it is not so.The nature of the chemical compound, known to us under the name of water studied is not enough to be able to say that we know everything about it.
Indeed, water is all around us, but in terms of its physical and chemical nature, very interesting is the fact that it is an almost universal solvent.This quality, in turn, is determined by a list of the properties of water that make-solvent universal connectivity.
For example, we all know from school that the increase in temperature from 0 C to 4 C is an increase in the density of matter, then the figure itself begins to decline gradually.This kind of change in the parameters of density is due to the peculiarities of the structure of water molecules and the nature of the interactions between them.An interesting and such a process in which the same intermittently, change the values of its parameters such as specific heat of water, density and thermal conductivity.As an example, such a dependency.It is found that the specific heat of water is almost two times higher than the rate of ice.
To explain this phenomenon, it should be recalled that, in fact, is the specific heat.To better understand the subject of the definition of the term should be elected to the specific heat.This value, denoted in physical formulas as "c", which shows the amount of heat energy must be spent in order to increase the temperature of 1 kg of the substance (in this case - the water) by one degree.
So, the water component of the specific heat anomaly is not only based on its value.It is proved experimentally that the specific heat of water is totally different values at different temperatures, and the nature of the dynamics is an unusual relationship.The heat capacity of water drops in significance only at temperatures ranging from 0 to 37 C. If the temperature is then raised, and the specific heat also rise.
In numerous experiments it was found that the lowest value of the specific heat of water is fixed at a value of temperature 36.8 C Reading through these lines, no association is this number?Of course!This is - an indicator of normal body temperature, not only humans, but also the vast number of warm-blooded animals.This measure, there is another interesting detail.The fact that the dynamics of the specific heat transmission performance is characterized by a kind of symmetry.It lies in the fact that at temperatures below zero also has its significance low heat.It is within the meaning of -20 C. It characterizes such parameter as the specific heat of the water table, which is used for the rapid determination of thermal conductivity values.
reason for this phenomenon to be explained on the basis of the analysis of physical properties of water.Water - a chemical compound that has a very high heat capacity.This means that, being able to absorb a significant amount of heat, the water itself, thus, heats up insignificantly.Compared with other substances, we can see that the specific heat of water as much as 5 times the same option from the sand and 10 times that of iron.
It is this ability of water to accumulate huge reserves of heat ensures the stability of the temperature regime in the world, allows to smooth the negative effects of temperature surges in connection with the change of seasons, the hours of the day.Water, due to its characteristics in the heat capacity, serves as the main temperature regulator of the Earth.
