Spontaneous


Moderators: Chem_Mod, Chem_Admin

Erik Buetow 1F
Posts: 96
Joined: Fri Aug 30, 2019 12:15 am

Spontaneous

Postby Erik Buetow 1F » Sun Feb 02, 2020 10:41 pm

When we talk about a spontaneous reaction being favorable, what exactly does that mean?

Eugene Chung 3F
Posts: 142
Joined: Wed Nov 15, 2017 3:03 am

Re: Spontaneous

Postby Eugene Chung 3F » Sun Feb 02, 2020 10:45 pm

Generally, reactions are favorable when they result in a decreased enthalpy and increased entropy of the system. When the reaction both decrease enthalpy and increase entropy, it occurs natually.

Anna Chen 1K
Posts: 104
Joined: Thu Jul 25, 2019 12:18 am

Re: Spontaneous

Postby Anna Chen 1K » Sun Feb 02, 2020 10:49 pm

Spontaneous, or favorable, reactions favor the formation of products over reactants and have a negative value in delta G. A reaction's overall entropy, or disorder, also increases.

chrisleung-2J
Posts: 112
Joined: Fri Aug 09, 2019 12:17 am
Been upvoted: 1 time

Re: Spontaneous

Postby chrisleung-2J » Sun Feb 02, 2020 10:50 pm

Reactions are favorable when they increase entropy and decrease enthalpy for the system, and favorable reactions tend to be spontaneous

IScarvie 1E
Posts: 66
Joined: Sat Aug 17, 2019 12:16 am

Re: Spontaneous

Postby IScarvie 1E » Wed Feb 05, 2020 7:24 pm

For a simpler example, ice melting to water at room temperature is favorable (low enthalpy high entropy), but water freezing into ice is not.


Return to “Concepts & Calculations Using Second Law of Thermodynamics”

Who is online

Users browsing this forum: No registered users and 1 guest