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  • Re: How many grams of carbon dioxide for 2 liters of 40 degree water at

    From dlzc@21:1/5 to wolfgang kern on Mon May 22 07:00:18 2023
    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.

    David A. Smith

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  • From Martin Brown@21:1/5 to dlzc on Mon May 22 22:50:49 2023
    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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