Last time i elaborated on the significance of the structure of water. Incase you missed it, you can check it HERE
And so today i will be discussing about the behavior and properties of ice. Read through and share your thoughts, ideas and what you learnt in the comment section below.
Behavior and properties
Just like any crystalline solid, the ice undergoes and elastic stress deformation, thereby returning to it's original state when the stress ceases.
All the same, if we apply a force to the sample of an ice for quite a long period of time, the first thing we will notice is that the sample will quickly deform or distort, with that the plasticity will also deform with an everlasting alteration of shape. This creep or deformation will lead to what scientist call a glacier flow. This glacier flow consists of 2 processes, namely; They are intracrystalline and recrystallization.
Intercrystalline gliding:
This gliding consists of layers within an ice crystall shear directly proportional to each other, without eradicating the constancy of of the crystal lattice,.Recrystallization gliding:
This gliding is the type in which crystals boundaries adhere to change in size,length or shape. Reckoning on the adaption of the stress and the adjacent crystals exerted on them.
The control of speed of the plastic deformation is know as the motion of dislocation. Take note; dislocation have no power to move under any plastic deformation.
The measurement of the the strength and power of an ice which apparently depends on countless factors is very difficult to measure. Scientists has show that, if ice is stressed for a long long period of time, it deforms and has no yielding point.
Thermal properties
The heat of an ice is absorbed by the heat fusion( absorbed on melting of a solid ice) this measurement is equivalent to 334 kilo joules per kilogram. While the exact heat of ice at freezing point is 2.04 kilojoules per kilogram per degree Celsius.
Another key facts to know about the glaciers is that, they have lowering and melting point this is because of the hydro static pressure is 0.0074 °C per bar. So therefore, for glacier 300 metres which is equivalent to (984 feet) and the ice very thick should be at the base of 0.25 °C (0.45 °F), with this measurement it it suggested that it is colder than the surface.
Optical properties
To know a pure ice it's through it's transparency, but the air bubbles makes it somewhat incomprehensible. The rate or absorption at which an incident radiation diminishes with strength, is about 0.1 cm-1 for ice snow and just 0.001 cm-1 for less ice or snow. Ice on the other hand is feeble birefringment and undoubtedly refracting, this also connotes that light is transported from different speeds and different crystallographic directions. The ice on the crystal strongly absorb light from the wavelengths, and therefore scattered light emerges from glacier crevasses green or blue.
At longer electromagnetic wavelengths, (radio frequency and micro wave) ice and dry snow are relatively transparent, although with the presence of small liquid amounts of water greatly modify this property. But nevertheless the slightest amount of liquid water distributed through the mass creates with great difficulties with this formula.
Refrence :
(https://www.britannica.com/science/water/Structures-of-ice)
Thanks for reading this post, in the next post we shall be discussing the physical property of ice.
