Changes

==Origin==

==Origin==

[[Latin]] ''effervescere'', from ''ex- + fervescere'' to begin to [[boil]], inchoative of ''fervēre'' to boil

[[Latin]] ''effervescere'', from ''ex- + fervescere'' to begin to [[boil]], inchoative of ''fervēre'' to boil

*[http://en.wikipedia.org/wiki/18th_century 1784]

*[https://en.wikipedia.org/wiki/18th_century 1784]

==Definitions==

==Definitions==

*1: to bubble, hiss, and foam as [[gas]] [[escapes]]

*1: to bubble, hiss, and foam as [[gas]] [[escapes]]

*2: to show liveliness or exhilaration  

*2: to show liveliness or exhilaration  

==Description==

==Description==

'''Effervescence''' is the [[escape]] of [[gas]] from an [[Water|aqueous]] solution and the foaming or fizzing that results from a release of the [[gas]]. An everyday example is seen in [http://en.wikipedia.org/wiki/Carbonation carbonated beverages] such as soft drinks. The visible bubbles are produced by effervescence from the dissolved gas (which itself is not visible in the [[liquid]] solution).

'''Effervescence''' is the [[escape]] of [[gas]] from an [[Water|aqueous]] solution and the foaming or fizzing that results from a release of the [[gas]]. An everyday example is seen in [https://en.wikipedia.org/wiki/Carbonation carbonated beverages] such as soft drinks. The visible bubbles are produced by effervescence from the dissolved gas (which itself is not visible in the [[liquid]] solution).

In the [[laboratory]], a common example of effervescence is seen if [http://en.wikipedia.org/wiki/Hydrochloric_acid hydrochloric acid] is added to a block of [http://en.wikipedia.org/wiki/Limestone 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.

In the [[laboratory]], a common example of effervescence is seen if [https://en.wikipedia.org/wiki/Hydrochloric_acid hydrochloric acid] is added to a block of [https://en.wikipedia.org/wiki/Limestone 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.

This [[process]] is generally [[represented]] by the following [[reaction]], where a pressurized dilute solution of carbonic acid in water releases gaseous carbon dioxide at [http://en.wikipedia.org/wiki/Decompression decompression]:

This [[process]] is generally [[represented]] by the following [[reaction]], where a pressurized dilute solution of carbonic acid in water releases gaseous carbon dioxide at [https://en.wikipedia.org/wiki/Decompression decompression]:

:H2CO3 → H2O + CO2

:H2CO3 → H2O + CO2