Spontaneous

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Ian Morris 3C
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Spontaneous

Postby Ian Morris 3C » Tue Feb 18, 2020 10:35 pm

What makes a reaction spontaneous, based on the value of Gibb's Free Energy.

Ryan Narisma 4G
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Joined: Fri Aug 30, 2019 12:18 am

Re: Spontaneous

Postby Ryan Narisma 4G » Tue Feb 18, 2020 10:37 pm

Hi Ian Morris 3C! To answer your question, when the Gibbs free energy value is less than 0 (a negative value), the reaction will be spontaneous. However, spontaneity does not correlate with the time it takes for the reaction to complete. I hope this helps!

605110118
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Joined: Wed Sep 18, 2019 12:21 am

Re: Spontaneous

Postby 605110118 » Tue Feb 18, 2020 10:44 pm

well good sir, if the value is negative, it is spontaneous, meaning left over NRG in the form of heat is exuded from the reaction.

Catherine Daye 1L
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Joined: Wed Sep 11, 2019 12:16 am

Re: Spontaneous

Postby Catherine Daye 1L » Wed Feb 19, 2020 1:38 am

Spontaneous reactions are described as having a negative Gibbs free energy.

Eunice Nguyen 4I
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Joined: Sat Aug 17, 2019 12:17 am

Re: Spontaneous

Postby Eunice Nguyen 4I » Wed Feb 19, 2020 1:57 am

In order to determine spontaneity based on Gibbs Free Energy:
ΔG∘<0 = spontaneous
ΔG∘<0 = not spontaneous

Justin Sarquiz 2F
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Joined: Fri Aug 30, 2019 12:15 am

Re: Spontaneous

Postby Justin Sarquiz 2F » Wed Feb 19, 2020 8:29 am

Delta G only determines whether a reaction is spontaneous or not. It says nothing about the speed of the reaction.

Miriam Villarreal 1J
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Re: Spontaneous

Postby Miriam Villarreal 1J » Thu Feb 20, 2020 2:48 pm

a spontaneous processes is one that occurs without the addition of external energy. A spontaneous process may take place quickly or slowly, because spontaneity is not related to kinetics or reaction rate.

Hailey Kim 4G
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Re: Spontaneous

Postby Hailey Kim 4G » Thu Feb 20, 2020 5:15 pm

A reaction is spontaneous when Delta(G) is greater than 0, or a negative value. When Delta(G) is a positive value, the reaction is not spontaneous, and the reverse reaction is favored. Finally, when Delta(G) is equal to 0, the reaction is at equilibrium.

Jainam Shah 4I
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Joined: Fri Aug 30, 2019 12:16 am

Re: Spontaneous

Postby Jainam Shah 4I » Thu Feb 20, 2020 6:42 pm

Delta G or the change in Gibbs free energy simply states whether a reaction will be spontaneous or not. A spontaneous reaction occurs naturally without input of energy. When Gibbs Free Energy is negative the reaction will be spontaneous

Anish Natarajan 4G
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Joined: Thu Jul 25, 2019 12:16 am

Re: Spontaneous

Postby Anish Natarajan 4G » Sat Feb 22, 2020 2:17 pm

If the Gibbs Free Energy is negative--that is, if T*DeltaS is larger than Delta H or Delta H is negative--then the reaction will be spontaneous. The inclusion of T as a variable shows that as temperature increases, all reactions eventually become spontaneous

Hussain Chharawalla 1G
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Re: Spontaneous

Postby Hussain Chharawalla 1G » Sun Feb 23, 2020 3:08 pm

It is also useful to note that temperature can affect the free energy in both ways either low or high temperature.


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