Chemical Forums
Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: linkamfai on June 24, 2015, 06:18:50 AM

How to prove that Delta G <= 0 for constant T and P processes,
What is the implication of this inequality?

You must show you have attempted the question, this is a Forum Rule (http://www.chemicalforums.com/index.php?topic=65859.0).

G=HTS
H=U+PV
=> G= U+PVTS
dG=dU+PdV +VdP  TdS  SdT
=> dU = dq+dw ; dw= dw'PexdV => w' = nonexpansion work
=> dG=dw'(max)
deltaG = w'(max)
but i don't know how to show delta G must <=0 for an isolated system, also the meaning for this inequality

Consider a fertilized hen egg in and incubator at a constant temperature and pressure environment.
The fertilized egg, hen proteins are formed into a highly ordered chick. Explain why the development of the chick is consistent with the second law. Please include the environment in the discussion.
b) Does the G of the system increase, decrease, or remain the same? How do you know?
ΔS_{uni}=ΔS(sys) + (ΔHsys/T)
is it because that the process of developing the chick would release heat to the environment?

Consider what you wrote in your other post, about the egg. Can you express that equation slightly differently?

What is the definition of each term in the Gibbs free energy equation you've quoted? Which part of your word problem matches which term in the equation? Does the development of the chick release heat into the system? And is that the only thing driving ΔG?

Consider what you wrote in your other post, about the egg. Can you express that equation slightly differently?
So why not merge the posts, and let's have all the work together. So I did. ;D