曼妥斯和可乐的反应原理

曼妥斯和可乐的反应原理YoudrinkCokeIt’scoolYoueatMentosIt’sfineBut!IfyoueatMentosafterdrinkingCoke……Whythishappens?Inordertoexplainthis,therearethreethingsweneedtoknow:TheingredientsofMentosTheingredientsofCokeHenry’slawTheingredientsofMentosThemainingredientsofMentosaresucrose,glucose,cornmeal,andgumarabic(formula:CH4O3S,mainingredientisarabicacid)TheingredientsofCokeThemainingredientsofCokearewater,sugar,carbonicacid,phosphoricacid,andcaffeine.Henry’slawAtaconstanttemperature,theamountofagivengasthatdissolvesinagiventypeandvolumeofliquidisdirectlyproportionaltothepartialpressureofthatgasinequilibriumwiththatliquid.在等温等压下，某种气体在溶液中的溶解度与液面上该气体的平衡压力成正比。

Cokecontainsalotofcarbondioxide,inordertodissolvelargeamountsofCO2intoasmallbottleofliquid,CO2gaswillbecompressedbyhighpressure.AccordingtotheLeChatelier’sprinciple,whenpressureincreases,moreCO2willdissolveinwater.

TheprincipleofreactionTherefore,whenpressurebecomesveryhigh,largeamountsofCO2willdissolveinwatercompletelytoformasuper-saturatedsolution,thissolutionbecomesveryunstablewhenweopentheCokebottle.(AccordingtotheHenry’slaw,thepressureinthebottledecreaseswhenweopenit,itmeanstheamountofgasthatcandissolveinaliquidalsodecreases,therefore,someCO2gaswillescapefromtheliquid.)THeprincipleofreactionTheprincipleofreactionInterference:Becausetherearemanycoremealgrainsinmentos,thesurfaceofmentosisveryrough,soitcanfunctionasaperfectcatalyst.Inotherwords,ithasinterferencefunction.

Rememberthatthesolutionisatsupersaturatestateanditisextremelyunstable,ifainterferencepointoccursinthesolution,thebalancewillbebrokenandlotsofCO2gaswillcomeoutofthesolution.(H2CO3----H2O+CO2)Thesolutionwilleventuallyreachitsequ