entropy

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itzeelpadillaDis1A
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Joined: Fri Sep 29, 2017 7:03 am

entropy

Postby itzeelpadillaDis1A » Fri Feb 02, 2018 12:03 pm

how does temperature and state of matter affect the entropy of a substance?

Caroline C 1G
Posts: 53
Joined: Fri Sep 29, 2017 7:05 am

Re: entropy

Postby Caroline C 1G » Fri Feb 02, 2018 12:18 pm

deltaS=q/T, therefore, a greater entropy change occurs in systems at lower temperatures when energy is transferred than in systems at higher temperatures where the same amount of energy is transferred. Gases have a higher entropy than liquids and liquids have a higher entropy than solids as gases can occupy more states than liquids, and liquids can occupy more states than solids. For example, water vapor will completely fill its container, water will take the shape of its container, but may not fill the entire space depending on its volume, and ice will not take the shape of its container due to its rigidity.

Kaelie Blanes-Ronda 2L
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Joined: Fri Sep 29, 2017 7:07 am
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Re: entropy

Postby Kaelie Blanes-Ronda 2L » Fri Feb 02, 2018 10:04 pm

Lavelle compared temperature and entropy with sneezing in a library (low noise=temperature) vs. sneezing in a busy bus station (loud noise=high temperature). The noise caused by a sneeze would cause more of a reaction in a library than a noisy place the same way entropy is more affected by low temperature than a high one. Gases are able to expand freely, liquids have more range of motion than solids so the entropy level increases from solids->liquids->gas.

Paula Dowdell 1F
Posts: 72
Joined: Tue Nov 15, 2016 3:00 am

Re: entropy

Postby Paula Dowdell 1F » Fri Feb 02, 2018 11:09 pm

It is always good to note that if you increase temperature, you increase entropy.

Ramya Lakkaraju 1B
Posts: 67
Joined: Fri Sep 29, 2017 7:03 am

Re: entropy

Postby Ramya Lakkaraju 1B » Tue Feb 06, 2018 10:36 am

Increasing volume also results in an increase in entropy since the gas can now have more microstates.


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