أكاديميا - كولنز - معاجم الجيب العلمية - الكيمياء - انكليزي - فرنسي - عربي الحرف ١_ t

Academia - Collins - Pocket Scientific Dictionaries - Chemistry - English - French - Arabic Letter 1_ T


temperature
température f

Temperature . The temperature of a substance is a measure of kinetic energy. The temperature scale used in our daily lives is the Celsius scale (or centigrade). In scientific works, the Kelvin scale is usually used.


tempering
trempe f. recuit m

normalization. This is what happens when metal is allowed to cool slowly in air. Thus, the metal becomes strong and springy.


terylene
terylène m

Trilene. Polyester is widely used in the manufacture of clothing and home furnishings. It is often mixed with natural fibers, such as terylene/wool mixture in different proportions.
The monomers are di-alcohols and di-acids. The formula for this isomer is:

Of diacid
From binary alcohol

tetrachloromethane
tetrachloromethane m

Tetrachloromethane. A dense, colorless liquid that is immiscible with water. It is a solvent for non-polar compounds.

This compound can be made from toughness by a reaction

CCI4

Substitution reaction involving chlorine:

4Cl2 (gas) + CH4 (gas) → CCl4 (liquid) + 4HCI (gas)

Other strength substituents (CH3CI, CH2CI2, CHCI3) are also formed, and the mixture must be separated to obtain pure products.


tetrahedral
tétraèdre m

Tetrahedral in a carbon compound, such as methane, where there are four single bonds leading to four atoms, the atoms are arranged in four surfaces around the carbon atom. The bonds indicate the corners of the imaginary cube with a carbon atom in the middle. In this way, the atoms are as far away from each other as possible. The angle between the bonds is a tetrahedral angle of 190°28.

CH4 Matan


thermal
thermique

thermal. A word that means action with heat, such as thermal dissociation, which is disintegration by means of heat.
And thermal energy is heat energy.

thermit reaction
Reaction of aluminothermique

Termit reaction. In this reaction, aluminum removes the oxygen of a higher metal in the reactivity series. Iron (II) oxide is usually used in the laboratory, and this oxide was used in industry to provide a small source of molten metal.

The reaction releases great heat and produces iron and aluminum oxide.

Fe2O3 (solid) + 2AI (solid) → Al2O3 (solid) + 2Fe (liquid)

In laboratory reactions, a magnesium “detonator” is usually used, and barium peroxide is used to start the reaction, which, once it begins, becomes extremely exothermic.

Magnesium detonator

Barium peroxide + magnesium powder

Al + Fe2O3

A bucket full of sand

This reaction can be used to weld cracks in
Iron .


thermometer
thermometer m

Thermometer. A thermometer measures temperature, that is, how hot something is. Although thermometers come in different shapes, the most common is the liquid-in-glass thermometer.
The liquid - usually mercury - is stored in a glass bulb, and when the temperature rises, the liquid expands and its level rises within the graduated tube according to the temperatures that can be read on the tube itself.