# CO2 in liquid

**URL:** <https://boards.straightdope.com/t/co2-in-liquid/556495>\
**Category:** Cecil's Columns/Staff Reports\
**Created:** [October 8, 2010, 2:36pm UTC](https://boards.straightdope.com/t/co2-in-liquid/556495 "2010-10-08T14:36:50Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![MadNotAngry](https://avatars.discourse-cdn.com/v4/letter/m/278dde/32.png) [@MadNotAngry](https://boards.straightdope.com/u/MadNotAngry)\
**Post date:** [October 8, 2010, 2:36pm UTC](https://boards.straightdope.com/t/co2-in-liquid/556495/1 "2010-10-08T14:36:50Z")

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In the SD column of May 17, 1985, titled “My Nutrasweetened soft drinks make huge mounds of foam! What gives?”, I believe there may be an error.

Cec sez: “… there was still a significant amount of foam left around the edge of the Diet Coke glass, whereas the regular Coke had all boiled down to nothing. Cecil attributes this partly to the fact that the products had been chilled” — Actually, IIRC, basic science teaches us that gases like CO2 dissolve better in cold liquids and solids dissolve better in hot liquids. I see this is true as I can’t wash dried egg off my plate very well in cold water, but it melts in hot. Also I’ve noted that warm soda fizzes like the dickens, even over ice, and ice cold soda is nearly flat by comparison.

So, what gives? Was Cecil (gulp) (of soda) wrong? Or did the fundamental rules of science change in the past 25 years?

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**Author:** ![johnpost](https://avatars.discourse-cdn.com/v4/letter/j/f17d59/32.png) [@johnpost](https://boards.straightdope.com/u/johnpost)\
**Post date:** [October 8, 2010, 3:10pm UTC](https://boards.straightdope.com/t/co2-in-liquid/556495/2 "2010-10-08T15:10:37Z")

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column cited

> **[My Nutrasweetened soft drinks make huge mounds of foam! What gives?](https://www.straightdope.com/21341563/my-nutrasweetened-soft-drinks-make-huge-mounds-of-foam-what-gives)**

the gas is more likely to come out of a warm liquid rather than cold. the added disturbance of pouring over a large amount of surface causes the gases to leave the liquid.

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**Author:** ![rvmartini](https://avatars.discourse-cdn.com/v4/letter/r/ecb155/32.png) [@rvmartini](https://boards.straightdope.com/u/rvmartini)\
**Post date:** [October 10, 2010, 1:02pm UTC](https://boards.straightdope.com/t/co2-in-liquid/556495/3 "2010-10-10T13:02:43Z")

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Sugar could 10% of the regular formula and leaving it out would be a significant ommission. I’m pretty sure it makes the product heavier.  
Does anybody know the foaming characteistics of Nutrasweet?