EFFERVESCENCE - traduction vers arabe
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EFFERVESCENCE - traduction vers arabe

FIZZING OR FOAMING CAUSED BY THE ESCAPE OF GAS FROM A SOLUTION
Effervescent; Effervescing; Fizz; Effervesce; Effervesced; Effervesces; Effervescence (chemistry); Fizzy

EFFERVESCENCE         

ألاسم

حال ; فَوْر

effervescence         
‎ فَوَران‎
effervescence         
هيجان

Définition

Effervescence

Wikipédia

Effervescence

Effervescence is the escape of gas from an aqueous solution and the foaming or fizzing that results from that release. The word effervescence is derived from the Latin verb fervere (to boil), preceded by the adverb ex. It has the same linguistic root as the word fermentation.

Effervescence can also be observed when opening a bottle of champagne, beer or carbonated beverages such as some carbonated soft drinks. The visible bubbles are produced by the escape from solution of the dissolved gas (which itself is not visible while dissolved in the liquid).

Although CO2 is most common for beverages, nitrogen gas is sometimes deliberately added to certain beers. The smaller bubble size creates a smoother beer head. Due to the poor solubility of nitrogen in beer, kegs or widgets are used for this.

In the laboratory, a common example of effervescence is seen if hydrochloric acid is added to a block of limestone. If a few pieces of marble or an antacid tablet are put in hydrochloric acid in a test tube fitted with a bung, effervescence of carbon dioxide can be witnessed.

CaCO 3 + 2 HCl CaCl 2 + H 2 O + CO 2 {\displaystyle {\ce {CaCO3 + 2 HCl -> CaCl2 + H2O + CO2 (^)}}}

This process is generally represented by the following reaction, where a pressurized dilute solution of carbonic acid in water releases gaseous carbon dioxide at decompression:

H 2 CO 3 H 2 O + CO 2 {\displaystyle {\ce {H2CO3 -> H2O + CO2 (^)}}}

In simple terms, it is the result of the chemical reaction occurring in the liquid which produces a gaseous product.

Exemples du corpus de texte pour EFFERVESCENCE
1. "But here is the very genesis of a new Syrian effervescence.
2. Gripped by years of stagnation that many Egyptians find painful, the country‘s political life is undergoing a startling effervescence.
3. True star: Alesha Dixon on Strictly Come Dancing True to form, Alesha Dixon has remained, publicly at least, the very picture of effervescence this week.
4. Updated: Wednesday, April 25, 2007 at 1526 hours IST New Delhi, April 25: From the effervescence of Satyajit Ray‘s movies to the current century Indian movies have again started to exert its originality.
5. The diplomatic effervescence continued with the initiative to convene "the Lebanese national dialogue," in which France broke its tradition of intervention in the Land of the Cedars by inviting Hezbollah to the talks, along with the rest of the quarreling factions in the country.