The soft drinks sold at county fairs are often dispensed from large pressurized containers that contain carbon dioxide g

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The soft drinks sold at county fairs are often dispensed
from large pressurized containers that contain carbon dioxide gas
above the liquid at a partial pressure of about 4 atm, compared to
carbon dioxide’s normal partial pressure of 0.00035 atm in the air
at sea level.
a. Describe the reversible change that takes place
inside one of these soft drink containers when the pressure of CO2
above the liquid is first brought from 0.00035 atm to 4 atm.
Explain why this system comes to a dynamic equilibrium in which
there is no net change in the amount of gas above the liquid or the
amount of gas dissolved in the liquid.
b. Explain why an increase in the partial pressure of
CO2 over a liquid leads to an increase in the solubility of the gas
in the liquid.