change in gibbs free energy

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Katherine Wu 1H
Posts: 104
Joined: Fri Aug 30, 2019 12:15 am
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change in gibbs free energy

Postby Katherine Wu 1H » Tue Mar 03, 2020 10:18 pm

Choose the one that best describes the change in Gibbs free energy for the process described; briefly justify your answer using a short sentence.
The photosynthesis of glucose inside the chloroplast of an old growth Coastal Redwood tree.
ΔG<0
ΔG=0
ΔG>0
I don't understand why the answer isn't ΔG>0?

205291012
Posts: 50
Joined: Mon Nov 11, 2019 12:17 am

Re: change in gibbs free energy

Postby 205291012 » Tue Mar 03, 2020 10:22 pm

I think delta G is probably positive since the process is not spontaneous. You have to input energy in the form of photons for the reaction to take place. Therefore, there isn't free energy available to do work. I'm not sure though.

Diana Andrade_4F
Posts: 50
Joined: Tue Nov 05, 2019 12:18 am

Re: change in gibbs free energy

Postby Diana Andrade_4F » Fri Mar 06, 2020 11:34 pm

Photosynthesis is not spontaneous and needs an input of energy in order for it to occur. So that's why the answer is ΔG<0

005384106
Posts: 101
Joined: Sat Aug 24, 2019 12:16 am

Re: change in gibbs free energy

Postby 005384106 » Sun Mar 08, 2020 1:11 pm

How do you know if you have -deltaG or G>0

005384106
Posts: 101
Joined: Sat Aug 24, 2019 12:16 am

Re: change in gibbs free energy

Postby 005384106 » Sun Mar 08, 2020 1:11 pm

What does it mean when a reaction is spontaneous?


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