Positional Disorder and Thermal Disorder

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Radha Patel 4I
Posts: 97
Joined: Tue Feb 12, 2019 12:15 am

Positional Disorder and Thermal Disorder

Postby Radha Patel 4I » Sat Mar 07, 2020 4:12 pm

What is the difference between positional disorder and thermal disorder when there is a change in entropy to a system ?

Andrew Pfeiffer 2E
Posts: 101
Joined: Sat Sep 28, 2019 12:16 am

Re: Positional Disorder and Thermal Disorder

Postby Andrew Pfeiffer 2E » Sat Mar 07, 2020 5:15 pm

Thermal disorder has to do with how rapidly the molecules in a substance move. The more the substance is heated, the more quickly the molecules move and bounce off of each other, and the higher the thermal disorder. Increased thermal disorder leads to increased entropy.

Positional disorder has to do with the level of disorganization in the location of the molecules in a substance. The more spread out the molecules, or the more unevenly mixed the molecules are, the higher the positional disorder. Higher positional disorder contributes to higher entropy.

Sally Qiu 2E
Posts: 105
Joined: Fri Aug 30, 2019 12:18 am

Re: Positional Disorder and Thermal Disorder

Postby Sally Qiu 2E » Sat Mar 07, 2020 6:47 pm

thermal disorder refers to the entropy of motion of molecules. if you add heat to a substance, the molecules move faster and thus thermal disorder increases. positional disorder refers to entropy of a molecule's orientation.


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