coordinate graphs

[chiddler]

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what kind of energy is that, exactly? It's potential energy, right? It goes up to high potential energy then releases heat when it goes down. This sounds right.

 

[chiddler]

Also, do catalysts affect the ΔG of reaction?

ΔG = -RTln(Keq)

no..they can't..because that would change equilibrium.

well i already typed this. in case anybody doesn't know, now you do.

 

[Dasypus]

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what kind of energy is that, exactly? It's potential energy, right? It goes up to high potential energy then releases heat when it goes down. This sounds right.

It's chemical energy. Sort of its own thing. Not 'potential', because potential energy is positional (within a field).

 

[RetailBoy]

It's chemical energy. Sort of its own thing. Not 'potential', because potential energy is positional (within a field).

It's potential energy.

first flat part = PE reactants
from there to the peak = EActivation
From there to last flat line = EA reverse reaction
Your enthalpy height diff b/w reactant line and product line

oh and the last line = PE products

 

[chiddler]

"In chemistry, Chemical energy is the potential of a chemical substance to undergo a transformation through a chemical reaction or, to transform other chemical substances"

what is the difference between chemical energy and potential energy in this context?

 

[RetailBoy]

"In chemistry, Chemical energy is the potential of a chemical substance to undergo a transformation through a chemical reaction or, to transform other chemical substances"

what is the difference between chemical energy and potential energy in this context?

That's like asking what is the difference in energy and kinetic energy for a car.

Potential chemical energy is just the energy stored between molecules. Like in a car: gasoline combusts and moves car.

chemical pot energy to kinetic energy.

Just like there is pot. elastic energy and kinetic elastic energy and P nuclear energy and k nuclear energy etc.

 

[Morsetlis]

When a point on that graph is not moving, it is PE.

Moving in between points to points involves the transformation of PE to KE and back.

You can also think of it as total energy in the system. That is why moving from one point to another over a hill is hard: it requires the input of energy. But, at the end, you get all of that energy refunded, and more besides ("overall energy released").

You realize that that reaction is the oxidation of glucose + O2 into water and CO2 (the O2 came from ETC oxidation of O2, and CO2 came from the breakdown of acetyl-CoA). The extra energy released is the net gain in ATP (through the proton gradient and ATP synthase).