Have you ever noticed that if you shake up a Cokeit will fizz as you open it? How about how a “flat”soda doesn’t taste as good as a regular soda? This all has to do with the chemistry of thecarbonation of Soft Drinks. Placing high amounts of Carbon Dioxide into thebottle allows for this process to occur (Haase 2).
Henry’s law (p=(kH)(c)) what goes into the fizzingand bottling of Soft Drinks (Rehmeyer 1). Carbon Dioxide reacting with water to formCarbonic Acid explains the chemistry behind thetaste of soft drinks (Stewart 1).
Henry’s law explains why a soda willbecome flat slowly after it has been opened. By opening the can or bottle of soda, thepressure (p) decreases, Therefore Carbondioxide’s concentration (c) in the soda willalso decrease. Surface tension is the only reason that thesoda does not spray carbon dioxide in theface of whoever is unlucky enough to openit (Rehmeyer 1).
The cans andbottles aredesigned to hold upto 20 atm ofpressure, and thesoda typicallycontains over 2atm, which willdecrease to 1 atmupon opening(Rohrig 11).
Carbon dioxide reactswith water once it isplaced into the bottleforming carbonic acid(H2CO3) (Rohrig 11). Carbonic acid creates asmall pain that the braincounteracts by sendingout signals “that willimprove your mood”(Stewart 1). This explains why a sodawill taste worse after ithas “gone flat” (Clough1).
Carbonic acidexplains theaddictions peopleobtain to theseunhealthy drinks,as seen by peoplethat will drinkcaffeine free anddiet soda (Stewart1). Henry’s Lawexplains whybottling company’sneed to make thebottles able towithstand severalatm of pressure(Rohrig 11). It alsoexplains why a sodagoes “flat”(Clough1).
Clough, David, Jon Richfield, and Martin Ross. "Flatrefusal." New Scientist 194.2606 (2007): 73. GeneralOneFile. Web. 6 Apr. 2013.Haase, Dr. David G. "How Much Carbon Dioxide is in aBottle of Soda?" The Science House. Ed. Beth SnokeHarris. NC State University, n.d. Web. 6 Apr. 2013 Rehmeyer, Julie. "Why Soda Goes Pop." Wired May 2011:54. General OneFile. Web. 6 Apr. 2013.Rohrig, Brian. "The Fizz-Keeper, Does It Really Keepthe Fizz?" ChemMatters Feb. 2002: 11-13. Print.Stewart, Julie. "The secret ingredient in soda." MensHealth Sept. 2010: 097. General OneFile. Web. 6 Apr.2013.