Spontaneous vs Favorable


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Rita Chen 1B
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Joined: Sat Jul 20, 2019 12:15 am

Spontaneous vs Favorable

Postby Rita Chen 1B » Sun Feb 09, 2020 1:02 pm

Can someone explain spontaneous vs favorable more? I feel like it's often used very interchangeably.

Naji Sarsam 1F
Posts: 104
Joined: Sat Aug 17, 2019 12:18 am

Re: Spontaneous vs Favorable

Postby Naji Sarsam 1F » Sun Feb 09, 2020 1:27 pm

There is no difference between the terms spontaneous and favorable in terms of chemical reactions. The formal term is actually spontaneous, but modern connotations of that word may make it seem that spontaneous reactions happen very quickly. Rather, the term means that the reaction is favorable and will happen, regardless of the rate of the reaction.

Lauren Stack 1C
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Joined: Sat Aug 17, 2019 12:18 am

Re: Spontaneous vs Favorable

Postby Lauren Stack 1C » Sun Feb 09, 2020 6:37 pm

I believe that favorable and spontaneous are used interchangeably. Both mean that a reaction will proceed without an input of energy.

Dan M -3E
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Joined: Wed Sep 18, 2019 12:19 am

Re: Spontaneous vs Favorable

Postby Dan M -3E » Sun Feb 09, 2020 9:02 pm

They both mean that the reaction will occur without energy coming from external sources being necessary. I think, as the people said above, there's been a shift toward using the word favorable, because spontaneous comes with the connotation that it will happen quickly, when in reality it just means the reaction will happen by itself over a differing amount of time.

Ashley Nguyen 2L
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Re: Spontaneous vs Favorable

Postby Ashley Nguyen 2L » Sun Feb 09, 2020 11:18 pm

Spontaneous and favorable refers to the same thing: the reaction will occur without external energy being added.

805394719
Posts: 104
Joined: Wed Sep 11, 2019 12:16 am

Re: Spontaneous vs Favorable

Postby 805394719 » Sun Feb 09, 2020 11:35 pm

When a reaction is spontaneous, it does not require a net input of energy to occur. For example, the melting of ice occurs spontaneously, or the diffusion of air does not require an effort whereas performing these reactions in the reverse direction would require an effort. When a reaction is spontaneous, it means that it occurs because it is favorable and since it is more favorable and thus more stable than the current state, it does not require energy input. For a reaction to be favorable, it does not have to achieve lower energy, however, as seen in the example of the expansion of air transferred from a smaller container to a larger container. In that case, the energy of the air particles does not alter but the entropy of the system increases which makes this reaction more favorable and thus likely to occur.

Trent Yamamoto 2J
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Re: Spontaneous vs Favorable

Postby Trent Yamamoto 2J » Mon Feb 10, 2020 12:22 pm

They both mean the same thing, that is the reaction will occur on its own without additional energy

JesseAuLec1Dis1G
Posts: 52
Joined: Mon Jun 17, 2019 7:23 am

Re: Spontaneous vs Favorable

Postby JesseAuLec1Dis1G » Mon Feb 10, 2020 1:22 pm

A favorable reaction is when energy is released, while a spontaneous reaction is when Gibbs free energy is negative.

Yiyang Jen Wang 4G
Posts: 76
Joined: Wed Nov 21, 2018 12:18 am

Re: Spontaneous vs Favorable

Postby Yiyang Jen Wang 4G » Mon Feb 10, 2020 1:52 pm

I think they have the same meaning and when a reaction is spontaneous it is favorable; and when a reaction is favorable it should occur spontaneously.


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