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Gas Phase Question

Posted: Tue Nov 19, 2019 11:23 am
by Bita Ghanei 1F
Even noble gasses, at very low temperatures, will condense to become liquids or freeze to become solid. At -200 degrees C, which is more likely to be a gas, Neon or Argon? Explain.

Could someone please provide the explanation for why Neon would be more likely to be a gas? Thank you!

Re: Gas Phase Question

Posted: Tue Nov 19, 2019 11:32 am
by jisulee1C
Neon has less London dispersion forces than Argon. Because there are less dispersion forces holding the Neon molecules together it is easier to break and the bonds are therefore weaker. Because the bonds are weaker it is more likely to be a gas (gas molecules are able to move around more freely than liquid or solid states).

Re: Gas Phase Question

Posted: Fri Nov 22, 2019 6:31 pm
by Sanjana Munagala_1j
The reason Neon has weaker London Dispersion forces is because it has a lower amount of electrons compared to Argon that can fluctuate and cause instantaneous dipole interactions. You can also consider how Neon has a lower polarizabilty and thus has a lower potential energy making the LDFs weaker.

Hope that helps!

Re: Gas Phase Question

Posted: Sat Nov 23, 2019 4:47 pm
by Edmund Zhi 2B
Argon's more electrons can potentially form stronger London dispersion forces than the fewer electrons in Neon

Re: Gas Phase Question

Posted: Tue Dec 03, 2019 12:04 pm
by Adelpha Chan 1B
Bita Ghanei 1F wrote:Even noble gasses, at very low temperatures, will condense to become liquids or freeze to become solid. At -200 degrees C, which is more likely to be a gas, Neon or Argon? Explain.

Could someone please provide the explanation for why Neon would be more likely to be a gas? Thank you!


As neon exhibits a lower molar mass, it also exhibits less london dispersion forces. With weaker london disperson forces, the bonds between its molecules in a liquid or solid form are more easily broken, allowing Neon to more likely be a gas than Argon

Re: Gas Phase Question

Posted: Sun Dec 08, 2019 9:21 am
by Mai V 4L
Does anyone have a video they think is a goood reference for this topic?