Delta S vs Delta U  [ENDORSED]


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904940852
Posts: 53
Joined: Fri Sep 29, 2017 7:07 am

Delta S vs Delta U

Postby 904940852 » Sun Feb 04, 2018 11:02 pm

Can someone explain the difference between delta S and delta U, and when and how to use each one?

Abigail Yap 2K
Posts: 51
Joined: Fri Sep 29, 2017 7:07 am

Re: Delta S vs Delta U

Postby Abigail Yap 2K » Sun Feb 04, 2018 11:13 pm

Hi,

Delta S is the change in entropy and delta U is the change in internal energy.

Mitch Mologne 1A
Posts: 74
Joined: Fri Sep 29, 2017 7:04 am

Re: Delta S vs Delta U

Postby Mitch Mologne 1A » Sun Feb 04, 2018 11:38 pm

Delta U represents the internal energy of a system, whether that is in the form of heat or work while Delta S represent the variability of different states that a molecule can be in (relating to degeneracy). Furthermore, Delta U uses strictly Jules as units while Delta S uses J/degree K.

Wenjie Dong 2E
Posts: 53
Joined: Fri Jun 23, 2017 11:40 am

Re: Delta S vs Delta U

Postby Wenjie Dong 2E » Mon Feb 05, 2018 12:35 pm

Abigail Yap 2K wrote:Hi,

Delta S is the change in entropy and delta U is the change in internal energy.


Agree.

Shanmitha Arun 1L
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Been upvoted: 1 time

Re: Delta S vs Delta U

Postby Shanmitha Arun 1L » Mon Feb 05, 2018 12:38 pm

For entropy, delta S is basically a measure of the change in order/disorder of the reaction. Increasing order gives us a negative delta S value, and decreasing order gives a positive delta S value. ΔU is the change in internal energy U of the system.

Alex Nechaev 1I
Posts: 50
Joined: Fri Sep 29, 2017 7:04 am

Re: Delta S vs Delta U  [ENDORSED]

Postby Alex Nechaev 1I » Mon Feb 05, 2018 2:07 pm

Delta S is the entropy of the system, and can be positive or negative to describe that change. Delta U is the change in the internal energy of the system.


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