Entropy vs Enthalpy

Moderators: Chem_Mod, Chem_Admin

Bryce Barbee
Posts: 103
Joined: Wed Sep 18, 2019 12:20 am

Entropy vs Enthalpy

Postby Bryce Barbee » Sat Jan 25, 2020 6:16 pm

Can someone explain the relationship between Entropy and Enthalpy if there is one?

san_2F
Posts: 118
Joined: Sat Jul 20, 2019 12:15 am

Re: Entropy vs Enthalpy

Postby san_2F » Sat Jan 25, 2020 6:23 pm

enthalpy is the amount of heat that is released or absorbed in a reaction whereas entropy is the degree of disorder. Generally, it takes energy to go from more disordered to less disordered, and energy is released when you go from less disorder to more disorder. Enthalpy and entropy are related in the equation deltaG= deltaH-T*deltaS.

Elena Bell 1C
Posts: 64
Joined: Thu Jul 11, 2019 12:16 am

Re: Entropy vs Enthalpy

Postby Elena Bell 1C » Sat Jan 25, 2020 6:54 pm

In high school chem, we also used the word "chaotic" to describe entropy. Usually, we used it for different phases, because gases would be more disordered/chaotic than liquids and solids.

Sydney Myers 4I
Posts: 100
Joined: Fri Aug 09, 2019 12:17 am

Re: Entropy vs Enthalpy

Postby Sydney Myers 4I » Sat Jan 25, 2020 7:16 pm

Enthalpy is the total amount of energy absorbed or released in a chemical reaction. It's made up of two components: one of them is usable energy that is stored in the chemical bonds of whatever molecule is formed (which is called free energy - G), entropy is the energy that is released and is unusable.

Max Madrzyk Dis 4G
Posts: 102
Joined: Wed Sep 18, 2019 12:21 am

Re: Entropy vs Enthalpy

Postby Max Madrzyk Dis 4G » Sat Jan 25, 2020 7:20 pm

Great question! I too was confused by this in lecture.

PranaviKolla2B
Posts: 114
Joined: Fri Aug 30, 2019 12:17 am

Re: Entropy vs Enthalpy

Postby PranaviKolla2B » Sat Jan 25, 2020 7:57 pm

What does each term relate to in the equation deltaG= deltaH-T*deltaS?

Sjeffrey_1C
Posts: 108
Joined: Wed Feb 20, 2019 12:17 am

Re: Entropy vs Enthalpy

Postby Sjeffrey_1C » Sat Jan 25, 2020 8:48 pm

PranaviKolla2B wrote:What does each term relate to in the equation deltaG= deltaH-T*deltaS?


I believe delta G is gibbs free energy, Delta H is enthalpy, and delta S is entropy. T is temperature.

Timmy Nguyen Dis 1I
Posts: 107
Joined: Sat Aug 17, 2019 12:17 am

Re: Entropy vs Enthalpy

Postby Timmy Nguyen Dis 1I » Sat Jan 25, 2020 11:31 pm

Gibbs free energy = Enthalpy - Temperature * Entropy.

BritneyP- 2c
Posts: 101
Joined: Sat Sep 14, 2019 12:15 am

Re: Entropy vs Enthalpy

Postby BritneyP- 2c » Sun Jan 26, 2020 1:22 am

Entropy is the amount of disorder there is in a system. Enthalpy is part of the function that is used to determine enthalpy, which is DeltaG= Enthalph- TdeltaS

Veronica Lu 2H
Posts: 89
Joined: Wed Sep 18, 2019 12:18 am
Been upvoted: 1 time

Re: Entropy vs Enthalpy

Postby Veronica Lu 2H » Sun Jan 26, 2020 11:45 am

Entropy is a measure of disorder in the universe whereas enthalpy is how much heat is absorbed or released in a given reaction


Return to “Phase Changes & Related Calculations”

Who is online

Users browsing this forum: No registered users and 1 guest