## calculation problem

Debate and discussion of any biological questions not pertaining to a particular topic.

kabuto
Coral
Posts: 118
Joined: Sun Apr 02, 2006 7:30 am

### calculation problem

The following reaction occur in glycolysis.

Fructose-6-phosphate --> glucose-6-phosphate K’ = 1.97

What is the ΔG for the reaction at 25 C.
If the concentration of fructose-6-phosphate is 1.5 M and the concentration of glucose-6-phosphate is 0.5 M, what is ΔG?
(R=8.315 J/mol K)
Explain ΔG0 and ΔG are different?

can anyone show me how to solve this??

raju
Garter
Posts: 30
Joined: Wed Nov 02, 2005 6:39 am
Location: india
Contact:
dude i think this is ur home work any how i can just give u a hint ant the name of book to reffer
hints:
1 . search for one standard equation that relates G and G0
2 , its famous name is gibbs equation for entrophy
books:
leninger
voit& voit
more than sufisient
or any bioenergitics or biochemistry or even thermodynamics book wil do all the values r been given subtitute to get the answer
the organisms that survive r not the one which r strongest nor the one which r briliant THEY R THE ONE WHICH RESPOND TO CHANGES IN NATURE FIRST

sdekivit
King Cobra
Posts: 586
Joined: Sat Jul 30, 2005 7:16 pm
Location: holland
Contact:

### Re: calculation problem

kabuto wrote:The following reaction occur in glycolysis.

Fructose-6-phosphate --> glucose-6-phosphate K’ = 1.97

What is the ΔG for the reaction at 25 C.
If the concentration of fructose-6-phosphate is 1.5 M and the concentration of glucose-6-phosphate is 0.5 M, what is ΔG?
(R=8.315 J/mol K)
Explain ΔG0 and ΔG are different?

can anyone show me how to solve this??

delta G = delta G(0) + RT ln [glucose-6-phosphate]/[fructose-6-phosphate]

delta G(0) is the standard Gibbs free energy under standard conditions and is therefore different delta G which isn't under standard conditions.

kabuto
Coral
Posts: 118
Joined: Sun Apr 02, 2006 7:30 am
thanks raju, sdekivit
i think i get it now

delta G = delta G(0) + RT ln [glucose-6-phosphate]/[fructose-6-phosphate]
deltaG= 1.97 + (8.315x25) ln(0.5/1.5)

another question.
what are delta G and delta G(0) use for?

### Who is online

Users browsing this forum: No registered users and 22 guests