Nonlinear vs linear molecules

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Chloe Alviz 1E
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Joined: Sat Aug 17, 2019 12:17 am

Nonlinear vs linear molecules

Postby Chloe Alviz 1E » Sat Feb 08, 2020 2:07 pm

What's the difference between nonlinear and linear molecules for heat capacity?

KeyaV1C
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Re: Nonlinear vs linear molecules

Postby KeyaV1C » Sat Feb 08, 2020 2:16 pm

Nonlinear molecules have 3 rotational degrees from the 3 axes of rotation. Since there is symmetry about only one axis, linear molecules have 2 rotational degrees. The degrees of freedom contribute to the heat capacity.

Veronica_Lubera_2A
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Re: Nonlinear vs linear molecules

Postby Veronica_Lubera_2A » Sat Feb 08, 2020 2:32 pm

Usually I think we will be given linear molecules in terms of symmetry since they are common ideal gases such as CO2 and O2.

Jesse H 2L
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Re: Nonlinear vs linear molecules

Postby Jesse H 2L » Sun Feb 09, 2020 2:57 pm

net rotational degrees of freedom, linear molecules only have 2, nonlinear molecules have 3 and the degrees of freedom contribute to the heat capacity.

Sydney Pell 2E
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Joined: Wed Sep 11, 2019 12:17 am

Re: Nonlinear vs linear molecules

Postby Sydney Pell 2E » Sun Feb 09, 2020 5:07 pm

I'm pretty sure that generally, nonlinear molecules will have higher molar heat capacities than linear molecules. For example, in 4C.1 from the textbook, NO2 (bent) has higher molar heat capacity than NO (linear).


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