Why filling a cup at the soda machine the fizz doesn’t overflow but when filling a cup from a 2 liter the fizz is very volatile and over flows easily and both drinks taste like the same carbonation level.

Question

Wow so many different answers to this question and a lot sound like they could possibly be correct. So tonight I’m going to test the cold beverage theory. Will poring cold soda into my tumbler full of ice result in less fizz bubbles. Up until now I’ve only pored warm soda into the ice fill receptacle.

I will also test the suggestion to used watery ice instead of the cold dry ice right out of the freezer. Will the watery warmer ice result in less fizz. I will use my warm soda along with watery ice to see if I get a different result.

In: Chemistry

Answer 1

It’s the ice. The ice from the fountain is in constant melt and is “wet” to the touch. Ice from your freezer is “dry” and will stick to your moist skin. I’m not a scientist, but I describe it as the Mentos effect. The ice at home has thousands of crystals that allow the bubbles to disperse and foam over. Take your ice at home and put in a glass and add cold water. Shake it around and pour out the water, add soda. It won’t fizz nearly as much as fresh ice. Or pay attention if you refill at home. Don’t add new ice, just pour soda over your remaining ice. Less foam.