Therhelp modynamics and the equilibrium constant

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SUMMARY

This discussion focuses on the relationship between thermodynamics and the equilibrium constant (Keq) in chemical reactions. The user seeks clarification on whether Keq refers to Kc, Kp, Ksp, Kf, or Kd, and whether Kc is universally applicable to all reactions. It is established that Kc pertains to concentration, while Kp relates to gas pressure, and other forms like Ksp, Kf, and Kd are specific to solubility, complex ion formation, and dissociation, respectively. Additionally, the derivation of the equation ΔG = ΔG° + RT ln(Keq) is requested, indicating a need for a deeper understanding of Physical Chemistry.

PREREQUISITES
  • Understanding of thermodynamics principles
  • Familiarity with equilibrium constants (Kc, Kp, Ksp, Kf, Kd)
  • Basic knowledge of Physical Chemistry
  • Ability to interpret chemical equations and reactions
NEXT STEPS
  • Study the derivation of the equation ΔG = ΔG° + RT ln(Keq)
  • Learn about the differences between Kc and Kp in chemical reactions
  • Explore the significance of Ksp in solubility equilibria
  • Investigate the role of Kf and Kd in complex ion formation and dissociation
USEFUL FOR

Chemistry students, educators in Physical Chemistry, and professionals involved in chemical reaction dynamics will benefit from this discussion.

mcato_O
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Therhelp ! modynamics and the equilibrium constant

Thermodynamics and the equilibrium constant

Okay I have a question about the equation (* means change) (*() means stander condition) so [G=*(G)+RT ln (Keq)] or just equation *(G)= - RT ln(Keq)
So what dose the (Keq) stander for? Kc? Kp? Ksp?? Kf or Kd

Is it always Kc regardless the chemical reaction? (that’s what my prof told me)
And then use the equation Kp=Kc (RT)^*n to convert K value?

Or is does Keq depends on the chemical reaction Kc for solution Kp for Gas?(from the textbook)

And can someone please derived the equation [G=*(G)+RT ln (Keq)] for me?
Where is it come from and why does it makes sense?
 
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The derivation is a bit extensive, and you'll have to cover some ground in Physical Chemistry before you can make sense out of this particular topic.

The Kc,Kp,Ksp,Kf,Kd are the equilibrium constants with respect to the concentration Kc, and pressure Kp; the rest are specific forms uniquely suited to the reaction dynamics. That is, they be in terms of the concentration or pressure. Ksp is in reference to the solubility, Kf to complex ion formation, Kd to dissociation.
 

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