Diet Coke & Mentos | MythBusters

this video could drive a car

I was sent here by Mrs Maxwell

Love this

man i miss this show

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Cherry coke works better

Or it could have just been the waxy surface insulating from the chemical reaction

This brings me back to when this was all over the internet.

Common chemistry. The surface area increases the rate of reaction. If you where to grind it up, it would be even faster. Same sort of idea when taking gels instead of pills. Pills take more time to take effect.

Now all the kids doing this with Regular Cola for some odd reason and they are fine with it HELP!

VE PRO BR DESVENDAT O MITO DO CU GRANDE AQUI DE MARINGA SP POR FAVOR PRESCISO SABER fdp

Well, this is one of those myths where doing it at home may be less dangerous than sloppy.

Who’s here from school 😂

I would’ve liked to seen them test the mentos ingredients in the coke. I don’t buy the whole nucleation thing. The green candy coating didn’t allow the coke to make contact with the contents of the candy. The should have ground the candy to a powder and then dropped that into the coke.

I keep scrolling and keep seeing higher and higher years form before

Some of the most fun myths to watch were the ones they said were safe to try at home.

im doing this for a scinece project in grade 9

If we convert kilometers in cm like architectural scale. Small miniature version. We get size of earth 13 cm, sizrr of sun 6.96 meter. And distance between them is 1.5 km.
And speed of sun light is infinity.
Look at the scale below. Correct me if i m wrong.

1000 km= 1 cm .
10000km=10 cm.
13000km=13 cm.
15000km=15 cm.
100000km=100 cm (1meter).
200000km=200 cm (2meter).
696000km=696 cm (6.96 meter).
1000000km=1000 cm (10 meter).
10000000km (1 CR)=10000cm (100 meter).
100000000km (10cr)=100000cm (1km)
150000000km(15 cr)=150000cm(1.5 km)

There's an episode where they fill a stomach with soda and pop rocks and I'm curious what would happen if they used mentos instead

I just read the wiki on this and there's some missing information here. First: It's not nucleation. That's just the term for change of state. Saying it's happening because of nucleation would be like saying water freezes because it freezes.

The fizzing IS nucleation but the REASON it is happening is because the CO2 is supersaturated in the soda when opened. That is, there's more CO2 dissolved into the liquid than the liquid can hold at the lower pressure. This is WHY the CO2 is releasing. The Mentos cause this to happen far more rapidly both because of the pits and the bubbles being introduced into the liquid when dropped in. It's not just the shape of the Mentos, but that the pits hold little pockets of air going in. When the Mentos enters the liquid the CO2, which is already nucleating, enters those bubbles in the pits of the Mentos. So the bubbles get filled with (more) CO2 and rise up out of the pits, but at the same time even more CO2 is using those pits to form new bubbles and rise so you get a rapid chain reaction.

CO2 can form bubbles on its own inside the liquid. This is called homogeneous nucleation. But it's even easier to form bubbles on surfaces that allow the bubble to form, like crevasses. This is called heterogeneous nucleation. Because heterogeneous nucleation makes it easier for bubbles to form, it's said to lower the "activation energy" needed to form bubbles.

The lower the activation energy, the less it takes for bubbles to form. So nucleation occurs faster with lower activation energy.

So to put this all together: when you open a bottle of soda it begins nucleation. The CO2 is supersaturated and begins to form bubbles. Forming bubbles in the liquid (homogeneous nucleation) has a higher activation energy so it's slow. Takes hours. Meanwhile you'll see more bubbles forming on the side of the bottle (heterogeneous nucleation), because that surface lowers the activation energy and thus more bubbles.

Mentos have millions of pits so it's adding hundreds of thousands of times more places for heterogeneous nucleation in addition to all the air bubbles the Mentos carry down trapped in those pits which can instantly absorb CO2 rather than having to wait. This causes an immediate chain reaction with very low activation energy.


Attempt at comparison:
Like if CO2 were people trying to leave a concert, and the liquid was the concert. The normal way out is taking cars or buses. Dropping in a Mentos is like if thousands of vacuum tubes instantly appeared around the entire concert venue for people to get in and be sucked away. The bubbles trapped in the pits would be like gusts of wind that blow people immediately into the tubes rather than waiting for them to get in on their own and they get sucked away like Futurama, thousands of people in seconds rather than waiting hours for car and bus traffic to clear.