On 22/05/2023 15:00, dlzc wrote:
On Sunday, May 21, 2023 at 10:30:35 PM UTC-7, wolfgang kern wrote:
The calculations never troubled me before today because it just
works.
But I'm suddenly tasked with manning the carbonation science booth
for at the local neighborhood summer block party and I want to have
at least some basic mathematical "science" behind me on the
paperboard descriptions.
I'll be having the kids evacuate the air out of 2-1/2 liter soda
bottles filled to only 2 liters of 40 degrees Fahrenheit water and
then thety will carbonate to about 30 psi but I don't know how many
grams of CO2 that is.
Where can I find that calculation given 100% partial pressure of
CO2?
A word of caution. Dissolution of CO2 in water is exothermic. They
have liquid-to-liquid heat exchangers to carry away the waste heat
when making carbonated waters and soda.
I doubt that you can persuade it to dissolve at a mere 30psi.
I'm pretty sure the soda siphons of old were much more robust steel
pressure vessels and at about 3-5 bar and slow release of the gas from a
small CO2 cartridge could be made to dissolve by shaking as it was
slowly released. Using very cold water helps to allow it to dissolve.
I haven't checked these data but it looks plausible to me:
https://www.prairiemoon.biz/sosisebofa.html
Many decades since I recall making soda water at home.
In the early days the glass ones could go spectacularly wrong! They
often had a wire mesh around them to prevent glass shards from flying.
--
Martin Brown
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