Melting point of solid argon vs. xenon

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JamieVu_2C
Posts: 108
Joined: Thu Jul 25, 2019 12:16 am

Melting point of solid argon vs. xenon

Postby JamieVu_2C » Wed Dec 04, 2019 2:26 am

Why is the melting point of xenon higher than that of argon?

nicolely2F
Posts: 149
Joined: Sat Sep 14, 2019 12:17 am

Re: Melting point of solid argon vs. xenon

Postby nicolely2F » Wed Dec 04, 2019 2:59 am

It's a larger atom, so it requires more energy to separate the additional electrons orbiting its nucleus.

Michael Nguyen 1E
Posts: 120
Joined: Sat Aug 17, 2019 12:17 am

Re: Melting point of solid argon vs. xenon

Postby Michael Nguyen 1E » Wed Dec 04, 2019 10:10 am

Argon and Xenon are both nonpolar. Therefore, the only forces that they experience are induced-dipole induced-dipole forces. Since Xenon is a larger atom than Argon and has more electrons, these induced-dipole induced-dipole forces are stronger in Xenon than in Argon. Therefore, it would take more energy to break Xenon's intermolecular forces than to break Argon's intermolecular forces, which means that Xenon has a higher melting point than Argon.


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