As carbon dioxide sublimates from a solid into a gas, what is happening to the pressure if the temperature is remaining constant?
pressure is lowered cause by lowering pressure you move equilibrium towards gaseous state (le chaterlier principle)
I would say pressure increases until equilibrium vapour pressure at given temperature is reached.
it can only sublimate if pressure is low enough for it to sublimate, if pressure is higher then it is necessary for pressure to be lowered... but yeah i got your point if pressure was stable and CO2 sublimates pressure would rise until equilibrium...
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