8.29 heat capacity

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Lorie Seuylemezian-2K
Posts: 62
Joined: Fri Sep 29, 2017 7:04 am

8.29 heat capacity

Postby Lorie Seuylemezian-2K » Thu Jan 18, 2018 10:57 am

Can someone explain to me why heat capacity increases as molecular complexity increases?

Dang Lam
Posts: 55
Joined: Thu Jul 27, 2017 3:01 am

Re: 8.29 heat capacity

Postby Dang Lam » Thu Jan 18, 2018 11:09 am

I believe it has to do with the increase in molecular motion and disorder.

Sally Nason - 1K
Posts: 40
Joined: Fri Sep 29, 2017 7:05 am

Re: 8.29 heat capacity

Postby Sally Nason - 1K » Thu Jan 18, 2018 11:43 am

From what I understand, there are three forms of movement that affect the internal energy of a molecule, and therefore the heat capacity. These are: translational, linear rotational, and nonlinear rotational. For more complex molecules, all three motions are occurring and therefore the molecule has more internal energy and a higher heat capacity.

Meredith Steinberg 2E
Posts: 50
Joined: Thu Jul 13, 2017 3:00 am

Re: 8.29 heat capacity

Postby Meredith Steinberg 2E » Thu Jan 18, 2018 11:59 am

The solutions manual explains that as more atoms are present in the molecule, there are more possible bond vibrations that can absorb added energy

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