Sublimation

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Michelle Fu 1H
Posts: 35
Joined: Fri Sep 28, 2018 12:19 am

Sublimation

Postby Michelle Fu 1H » Fri Jan 25, 2019 5:57 pm

Last unit we talked about how increasing pressure would push the equilibrium towards the side with less moles or more compact molecules, thus creating more solids in some cases. I was wondering in cases which two gases go straight to a solid how it bypasses the step of turning into a liquid, like water does.

Aurbal Popal
Posts: 63
Joined: Fri Sep 28, 2018 12:27 am

Re: Sublimation

Postby Aurbal Popal » Sat Jan 26, 2019 2:24 pm

Increasing pressure would push the equilibrium towards the side with less gaseous moles. It does not apply to solids or liquids.

Noah Fox 1E
Posts: 31
Joined: Fri Sep 28, 2018 12:20 am

Re: Sublimation

Postby Noah Fox 1E » Sat Jan 26, 2019 3:06 pm

I suppose it would be able to bypass the step of turning into a liquid because of incredibly strong intermolecular forces, however I do not know if this would create solid materials or incredibly viscous non-newtonian-like fluids

Henry Dudley 1G
Posts: 61
Joined: Fri Sep 28, 2018 12:16 am

Re: Sublimation

Postby Henry Dudley 1G » Sat Jan 26, 2019 3:50 pm

Yeah how do compounds like CO2 in the form of dry ice go straight from being a solid to a liquid? Does CO2 even have a liquid state, and if not, how is that possible?

Schuyler_Howell_4D
Posts: 66
Joined: Fri Sep 28, 2018 12:28 am
Been upvoted: 1 time

Re: Sublimation

Postby Schuyler_Howell_4D » Sat Jan 26, 2019 4:23 pm

In response to the question about dry ice, it is special in the way that carbon in the form of dry ice goes directly to a gas phase and doesn't become a liquid. Sublimation occurs because the phase change happens at temperatures and pressures that can't allow the compound to be liquid. It requires a lot of energy in the form of heat to skip the liquid phase.

Porus_Karwa_2E
Posts: 72
Joined: Fri Sep 28, 2018 12:24 am

Re: Sublimation

Postby Porus_Karwa_2E » Sat Jan 26, 2019 7:17 pm

This does not effect solids or liquids

Theodore_Herring_1A
Posts: 60
Joined: Fri Sep 28, 2018 12:29 am

Re: Sublimation

Postby Theodore_Herring_1A » Sun Jan 27, 2019 1:40 pm

It will bypass the liquid state if there is not enough pressure for the compound to form a liquid state, and thus will skip directly to the gas phase. For there to be a liquid state, the pressure would have to be very high.


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