Diet Coke + Mentos

[GOthique]

+++ wow! sooo kewl!!

[UYOGZ]

ka kas pud sa coke ani uie... maypa inyo nalang imnon kaysa inyong ekspermentohan... hehehe...

[robertski3]

tinood bitaw ni....

[Fresno]

The surface of Mentos candies are high in surface area, and are bumpy and pitted. Bumpy surfaces tend to "seed" bubbles out of carbonated drinks. What is meant by "seeding" this means is that when a gas is dissolved in a solution, it remains within the solution in microscopic bubbles. If there is an area where these microscopic bubbles can gather, they will do so to create a larger bubble (due to the hydrophobic effect). Areas that promote these microscopic bubbles to gather are called "seeds". Eventually the bubble will be too large to simply stay in solution and begin to rise to the surface, often as a visible tiny bubble. This is the same reason why after pouring yourself a glass of your favorite carbonated beverage, you may see small bubbling trails seemingly coming from the side of the glass out of nowhere. The "source" or origin of the bubbling is likely a small imperfection of the glass seeding bubbles.

When you drop the Mentos in, the carbon dioxide bubbles in the soda becomes seeded all over the entire surface of the candy's surface. Due to its high surface area, it seeds millions of bubbles at once, creating rapid gas release from solution. Additionally, gum arabic coating the surface of the candy acts as a surfactant, decreasing surface tension of the bubbles on its surface. Low surface tension also helps bubbles grow quickly. Aspartame (the artificial sweetener in diet coke) also works as a surfactant in solution, further decreasing surface area and increasing bubbling. Finally, Mentos are also fairly dense and sink rapidly, quickly creating bubbles that seed further bubbles as they rise, creating an exponential effect as the bubbles rise to the surface, as the bubbles are given more time to gather more bubbles as they rise.

[jebz]

^^Aba, what a nerd huh?hehehe...

[dhingarhdz]

= Kaboooooom! or Splash!

[rodsky]

Quote: Originally Posted by jebz ^^Aba, what a nerd huh?hehehe...

In this subforum, nerds and geeks are KING.

-RODION

[jebz]

Quote: Originally Posted by rodsky In this subforum, nerds and geeks are KING. -RODION

Oh really huh?

[rodsky]

Quote: Originally Posted by jebz Oh really huh?

Yes. And please do stay on topic, or you'll receive an infraction.

-RODION

[gcc4426]

kita nko ani. chui kayo...labi na ig-buwa. usikan lng kos coke.

[kayi101]

sayanga jud sa coke wui..haha

[joan_of_arc324]

we did this in class to show chemical reaction and newton's third law of motion...

[SEED OF LIBER]

Rofl...!


i wonder what happen if you just swallow like 5 mentos with out chewing it and drink a lot of coke.





ty...

[beyee]

a sure-fire alternative to our regular fireworks display hehehe

[insect111]

Quote: Originally Posted by james_chaw surprisingly, this is considered as a Physical reaction, and NOT chemical reaction. i forgot why.

sakto, dili ni siya chemical reaction. as what the mythbuster people stated on the show, it's because of NUCLEATION.

Most nucleation processes are physical, rather than chemical, but a few exceptions do exist (e.g. electrochemical nucleation) .

Nucleation - Wikipedia, the free encyclopedia

Diet Coke and Mentos eruption - Wikipedia, the free encyclopedia

Science of Mentos-Diet Coke explosions explained - physics-math - 12 June 2008 - New Scientist

American Journal of Physics Abstract (Diet Coke and Mentos: What is really behind this physical reaction?)

Quote: Originally Posted by joan_of_arc324 we did this in class to show chemical reaction and newton's third law of motion...

it was a wrong example of a chemical reaction because in this case, it is not a chemical reaction. there are many ways to properly show chemical reaction, like burning paper or cooking an egg.