Change in Enthalpy vs. Change in Entropy  [ENDORSED]

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Rakhi Ratanjee 1D
Posts: 59
Joined: Fri Sep 29, 2017 7:04 am

Change in Enthalpy vs. Change in Entropy

Postby Rakhi Ratanjee 1D » Sat Mar 10, 2018 6:31 pm

In one of the practice problems I was doing, I noticed that although heat is conserved from the system to the surroundings: delta H (system) = - (delta H surroundings), the same idea does not apply for entropy. For example, although enthalpy is conserved, the entropy lost by a system and gained by the surroundings are completely different. Why is change in entropy not conserved as well?

Nhan Nguyen 2F
Posts: 52
Joined: Thu Jul 13, 2017 3:00 am
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Re: Change in Enthalpy vs. Change in Entropy

Postby Nhan Nguyen 2F » Sat Mar 10, 2018 6:42 pm

Conservation of anything implies that it cannot be created nor destroyed. However, Entropy is not conserved because it's something that is generated from the "disorder" of systems. Also note that the second law of Thermodynamics states that entropy within an isolated system will keep increasing.

Angel Ni 2K
Posts: 50
Joined: Sat Jul 22, 2017 3:01 am

Re: Change in Enthalpy vs. Change in Entropy  [ENDORSED]

Postby Angel Ni 2K » Sat Mar 10, 2018 7:45 pm

Enthalpy is a state property and entropy is not.

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