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A device like a Sodastream is used to inject CO2 into water. The device itself holds a gas canister of volume 0.95 liters that, when
A device like a Sodastream is used to inject CO2 into water. The device itself holds a gas canister of volume 0.95 liters that, when full, contains 410 grams of CO2. Let's explore a hypothetical scenario in which the manufacturer is filling a canister. We will assume the canister is initially at 0psig(14.7psia ) and holds only CO2 (and at this low of pressure and an assumed temperature of 68F, we can treat CO2 as an ideal gas). The fill rate is a constant mf=200 grams of CO2 per minute, but unknowingly the filling valve was not correctly sealed, which allows gas to escape at a rate proportional to the current mass of CO2 in the canister. (This is not safe, which is why we're using a mathematical model to explore this process, rather than a live experiment!) If the vessel takes three minutes to fill, what is the constant of proportionality (report the number and the units) for the scenario described above? If you use your mathematical model and the constant of proportionality you solved for, comment on the results you obtain for "very long times." Does your result make sense? Why or why not? (Hint: What have you assumed if you allow your model to run to very long time?)
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