Why Did My Coffee Just Bubble When I Put A Spoon In It ?

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Offline neilep

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Dearest scientists, academics, engineers, analysts, klevur peeps and Kiwi fruit,

I just made this coffee !


[attachment=15391]

Some coffee I just made !


Ewe'd think it's fairly straightforward ...ewe get your coffee, ewe add some milk then add the boiled water.

but..I added too much milk and so my coffee was not operating within acceptable temperate parameters...so...I whack it in the microwave for a couple of mins and it came out bubbling and kind of extra milky too !

When the boiling subsided I stirred it with the spoon and it immediately frothalised again for a few seconds !!

Why's that then ? Why Did My Coffee Just Bubble When I Put A Spoon In It ?....also...why did the microwave make it more milkyish ?!......is it because the milk was boiled too ?

whajafink ?


hugs and shmishes


mwah mwah mwah



Neil
Je vais Pendre Une Cafe
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Men are the same as women, just inside out !

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Offline Geezer

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Why Did My Coffee Just Bubble When I Put A Spoon In It ?
« Reply #1 on: 11/10/2011 14:49:39 »
This is one of JP's favorites. He's always rabbiting on about it. What ewe might have done is superheated the water/milk in your "coffee" (quotes because there is only a loose association between that stuff and actual coffee).

When you superheat water, its temperature is at (or possibly even above?) the boiling point of water, which, in London, will be pretty close to 100░C (or 373.15K for the purists), but the water isn't actually boiling. When you stuck your spoon in it, the spoon became a nucleation site that "jiggled" the superheated water and made it boil. Hence the frothing.

That's one possibility anyway. I wonder if it might have happened because your coffee mug stored some of the heat energy from the microwave for a bit then the heat transferred into the coffee and made it boil, but I'm not sure if that's possible. 
There ain'ta no sanity clause, and there ain'ta no centrifugal force Šther.

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Offline CZARCAR

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Why Did My Coffee Just Bubble When I Put A Spoon In It ?
« Reply #2 on: 11/10/2011 19:45:43 »
how hot did the mug get? how cold was the spoon?

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Offline Geezer

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Why Did My Coffee Just Bubble When I Put A Spoon In It ?
« Reply #3 on: 11/10/2011 21:13:27 »
I suppose we might also ask why milk boils over the side of the pan but water doesn't (usually) do that. Or would that be a different question?
There ain'ta no sanity clause, and there ain'ta no centrifugal force Šther.

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Offline Geezer

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Why Did My Coffee Just Bubble When I Put A Spoon In It ?
« Reply #4 on: 11/10/2011 21:16:51 »
how hot did the mug get? how cold was the spoon?

Mug 92.64░C
Spoon 283.068░R

(How the heck would he know? He's a sheep!)
There ain'ta no sanity clause, and there ain'ta no centrifugal force Šther.

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Offline damocles

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Why Did My Coffee Just Bubble When I Put A Spoon In It ?
« Reply #5 on: 11/10/2011 22:34:12 »
Clearly 'twas a latte with ambition to become a cappuccino
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a perfect perfect square square
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Offline Geezer

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Why Did My Coffee Just Bubble When I Put A Spoon In It ?
« Reply #6 on: 11/10/2011 22:46:53 »
If a sheep drinks too much coffee, does it turn into a wooly jumper?

http://www.shaunthesheep.com/games/woolyjumper/
There ain'ta no sanity clause, and there ain'ta no centrifugal force Šther.

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Offline neilep

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Why Did My Coffee Just Bubble When I Put A Spoon In It ?
« Reply #7 on: 12/10/2011 05:05:55 »
This is one of JP's favorites. He's always rabbiting on about it. What ewe might have done is superheated the water/milk in your "coffee" (quotes because there is only a loose association between that stuff and actual coffee).

When you superheat water, its temperature is at (or possibly even above?) the boiling point of water, which, in London, will be pretty close to 100░C (or 373.15K for the purists), but the water isn't actually boiling. When you stuck your spoon in it, the spoon became a nucleation site that "jiggled" the superheated water and made it boil. Hence the frothing.

That's one possibility anyway. I wonder if it might have happened because your coffee mug stored some of the heat energy from the microwave for a bit then the heat transferred into the coffee and made it boil, but I'm not sure if that's possible. 

Thanks Geezer !...gosh !..Nucleation !...ewe mean my coffee turned into a power station !...wow !..  [;)]
Men are the same as women, just inside out !

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Offline neilep

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Why Did My Coffee Just Bubble When I Put A Spoon In It ?
« Reply #8 on: 12/10/2011 05:07:27 »
how hot did the mug get? how cold was the spoon?

Thanks CZARCAR .The mug was hot and the spoon was room temp... unfortunately I was fresh out of mug and spoon thermometers  !  [;)]
Men are the same as women, just inside out !

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Offline neilep

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Why Did My Coffee Just Bubble When I Put A Spoon In It ?
« Reply #9 on: 12/10/2011 05:08:07 »
how hot did the mug get? how cold was the spoon?

Mug 92.64░C
Spoon 283.068░R

(How the heck would he know? He's a sheep!)

Voila !!...Baaa !!
Men are the same as women, just inside out !

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Offline neilep

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Why Did My Coffee Just Bubble When I Put A Spoon In It ?
« Reply #10 on: 12/10/2011 05:10:51 »
Clearly 'twas a latte with ambition to become a cappuccino

Thanks damocles...I'm sure ewe are right...nevertheless..the coffee did have that extra creamy enhancement !...ewe should try it....make a coffee then whack it in the microwave till it boils...it'll be more frothy and milky !  [:)]
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Offline neilep

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Why Did My Coffee Just Bubble When I Put A Spoon In It ?
« Reply #11 on: 12/10/2011 05:12:59 »
If a sheep drinks too much coffee, does it turn into a wooly jumper?

http://www.shaunthesheep.com/games/woolyjumper/

My record is 3...now that's a high score !!
Men are the same as women, just inside out !

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Offline Geezer

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Why Did My Coffee Just Bubble When I Put A Spoon In It ?
« Reply #12 on: 12/10/2011 08:31:16 »
If a sheep drinks too much coffee, does it turn into a wooly jumper?

http://www.shaunthesheep.com/games/woolyjumper/

My record is 3...now that's a high score !!

You're way ahead of me!

(What a great site! I stumbled on it by googling "wooly jumper". My daughter and I are Wallace and Gromit addicts. I even have a son-in-law called Sean!)
There ain'ta no sanity clause, and there ain'ta no centrifugal force Šther.

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Offline damocles

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Why Did My Coffee Just Bubble When I Put A Spoon In It ?
« Reply #13 on: 12/10/2011 08:56:04 »
It is quite possible that the extra "milkiness" is caused by some denaturing or demicellization of the protein casing (... err caesin ...) leading to greater exposure of the fat globules that constitute "milkiness".

I drink my coffee long and weak black.
1 4 6 4 1
4 4 9 4 4     
a perfect perfect square square
6 9 6 9 6
4 4 9 4 4
1 4 6 4 1

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Offline Karen W.

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Why Did My Coffee Just Bubble When I Put A Spoon In It ?
« Reply #14 on: 12/10/2011 09:13:27 »
If a sheep drinks too much coffee, does it turn into a wooly jumper?

http://www.shaunthesheep.com/games/woolyjumper/

I tied your record of 3 on my phone...lol

My record is 3...now that's a high score !!

"Life is not measured by the number of Breaths we take, but by the moments that take our breath away."

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Offline damocles

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Why Did My Coffee Just Bubble When I Put A Spoon In It ?
« Reply #15 on: 12/10/2011 13:55:39 »
Quote
If a sheep drinks too much coffee, does it turn into a wooly jumper?

Here in Oz, woolly jumpers are usually the result of the local 'roos socializing with the flock  [;D]
1 4 6 4 1
4 4 9 4 4     
a perfect perfect square square
6 9 6 9 6
4 4 9 4 4
1 4 6 4 1

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Offline Geezer

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Why Did My Coffee Just Bubble When I Put A Spoon In It ?
« Reply #16 on: 12/10/2011 22:44:06 »
Would the coffee go all frothy if you were to dangle your spoon over it for a bit?

(The dreaded Spoon of Damocles.)
There ain'ta no sanity clause, and there ain'ta no centrifugal force Šther.

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Offline CZARCAR

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Why Did My Coffee Just Bubble When I Put A Spoon In It ?
« Reply #17 on: 12/10/2011 23:42:28 »
where might the coffe in the mug get superheated?on bottom? then the spoon inserts & provides a thermal conductive metal path from bottom to top ?

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Offline Geezer

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Why Did My Coffee Just Bubble When I Put A Spoon In It ?
« Reply #18 on: 13/10/2011 02:48:26 »
I think the Dalek blasted the coffee with its death ray.
There ain'ta no sanity clause, and there ain'ta no centrifugal force Šther.

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Offline neilep

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Why Did My Coffee Just Bubble When I Put A Spoon In It ?
« Reply #19 on: 13/10/2011 19:09:29 »
If a sheep drinks too much coffee, does it turn into a wooly jumper?

http://www.shaunthesheep.com/games/woolyjumper/

My record is 3...now that's a high score !!

You're way ahead of me!

(What a great site! I stumbled on it by googling "wooly jumper". My daughter and I are Wallace and Gromit addicts. I even have a son-in-law called Sean!)

I just did 24 because I finally figured you have to click the arrows not move the friggin mouse like the stupid instructions say so !!
Men are the same as women, just inside out !

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Offline neilep

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Why Did My Coffee Just Bubble When I Put A Spoon In It ?
« Reply #20 on: 13/10/2011 19:11:33 »
It is quite possible that the extra "milkiness" is caused by some denaturing or demicellization of the protein casing (... err caesin ...) leading to greater exposure of the fat globules that constitute "milkiness".

I drink my coffee long and weak black.

Thanks so much damocles ....I understand what ' weak and black  ' is but what is a long coffee  ?!...thanks again !
Men are the same as women, just inside out !

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Offline neilep

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Why Did My Coffee Just Bubble When I Put A Spoon In It ?
« Reply #21 on: 13/10/2011 19:12:39 »
Would the coffee go all frothy if you were to dangle your spoon over it for a bit?

(The dreaded Spoon of Damocles.)

I will try this tomorrow.....I'll stand over my coffee, squat and dangle the spoon from an extremity ! :-)
Men are the same as women, just inside out !

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Offline neilep

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Why Did My Coffee Just Bubble When I Put A Spoon In It ?
« Reply #22 on: 13/10/2011 19:13:46 »
where might the coffe in the mug get superheated?on bottom? then the spoon inserts & provides a thermal conductive metal path from bottom to top ?

Thanks also CZARCAR..I do appreciate these answers.
Men are the same as women, just inside out !

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Offline neilep

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Why Did My Coffee Just Bubble When I Put A Spoon In It ?
« Reply #23 on: 13/10/2011 19:14:18 »
I think the Dalek blasted the coffee with its death ray.

I exterminated the coffee by drinking it !
Men are the same as women, just inside out !

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Offline Geezer

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Why Did My Coffee Just Bubble When I Put A Spoon In It ?
« Reply #24 on: 13/10/2011 19:24:49 »
If a sheep drinks too much coffee, does it turn into a wooly jumper?

http://www.shaunthesheep.com/games/woolyjumper/

My record is 3...now that's a high score !!

You're way ahead of me!

(What a great site! I stumbled on it by googling "wooly jumper". My daughter and I are Wallace and Gromit addicts. I even have a son-in-law called Sean!)

I just did 24 because I finally figured you have to click the arrows not move the friggin mouse like the stupid instructions say so !!

That explains it!

(Crap! Now I can't get the silly tune out of my head!)
« Last Edit: 13/10/2011 19:28:44 by Geezer »
There ain'ta no sanity clause, and there ain'ta no centrifugal force Šther.

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Offline damocles

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Why Did My Coffee Just Bubble When I Put A Spoon In It ?
« Reply #25 on: 13/10/2011 21:11:45 »
It is quite possible that the extra "milkiness" is caused by some denaturing or demicellization of the protein casing (... err caesin ...) leading to greater exposure of the fat globules that constitute "milkiness".

I drink my coffee long and weak black.

Thanks so much damocles ....I understand what ' weak and black  ' is but what is a long coffee  ?!...thanks again !


A long coffee is one that is served in a normal cup or even a large mug rather than a tiny espresso cup -- a coffee with no water rationing!
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4 4 9 4 4     
a perfect perfect square square
6 9 6 9 6
4 4 9 4 4
1 4 6 4 1

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Offline Karen W.

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Why Did My Coffee Just Bubble When I Put A Spoon In It ?
« Reply #26 on: 14/10/2011 02:50:45 »
,ool...I wanted to know the same thing....lol.....and my top score was only 3 also...

"Life is not measured by the number of Breaths we take, but by the moments that take our breath away."