I am confusing about the delta G(free-energy change). Could any one

Click For Summary
SUMMARY

The discussion clarifies the concepts of delta G (free-energy change), exergonic and endergonic processes, and their relationship with entropy (delta S). An endergonic reaction, characterized by a positive delta G, absorbs free energy, while an exergonic reaction, with a negative delta G, releases free energy. The entropy of a system indicates disorder and affects the available energy for work, but it does not independently influence delta G; the change in enthalpy (H) is also essential for this calculation.

PREREQUISITES
  • Understanding of thermodynamics principles
  • Familiarity with Gibbs free energy equations
  • Knowledge of entropy (delta S) concepts
  • Basic grasp of enthalpy (delta H) and its role in reactions
NEXT STEPS
  • Study the Gibbs free energy equation and its applications
  • Explore the differences between exergonic and endergonic reactions
  • Investigate the relationship between delta G, delta H, and delta S in chemical reactions
  • Learn about practical examples of thermodynamic processes in biochemical reactions
USEFUL FOR

This discussion is beneficial for students of chemistry, biochemistry researchers, and anyone seeking to understand the principles of thermodynamics in chemical reactions.

quynhchi0907
Messages
3
Reaction score
0
I am confusing about the delta G(free-energy change). Could anyone explain me more about the sign of delta G. wat the exergonic and endergonic process mean? also, wat is the relation between the delta G and delta S(entropy)? I know the formula between them, but I don't quite understand

Thank you,
 
Chemistry news on Phys.org


Free energy is essentially the ability to do work. A reaction where free energy is absorbed from the environment has work being done on the reactants (this is endergonic, delta G is positive). When free energy is release by a reaction, the reactants have done work on the environment (this is exergonic, delta G is negative). The entropy of a system represents the amount of disorder when a reaction occurs. It will determine how much of the available energy in a system can do work. Change in entropy alone, however, does not influence delta G. The change in enthalpy (H) must also be known.
 

Similar threads

Confusion about the use of partial molar Gibbs free energy
  • · Replies 11 ·
Replies
11
Views
3K
Chemistry How to reason about Gibbs energy change due to entropy not enthalpy?
  • · Replies 4 ·
Replies
4
Views
2K
Chemistry Understanding derivation of Clausius-Clapeyron equation
  • · Replies 2 ·
Replies
2
Views
2K
Change in Free Energy when Heating a Substance
  • · Replies 9 ·
Replies
9
Views
3K
Electrokinetics: charge transfer coefficient
  • · Replies 1 ·
Replies
1
Views
4K
High School Change in entropy of reversible isothermal process
  • · Replies 11 ·
Replies
11
Views
3K
Undergrad Meaning of average pressure in statistical mechanics
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Minimization of the Gibbs energy when number of molecules varies
  • · Replies 16 ·
Replies
16
Views
3K
Questions regarding Gibbs energy changes
  • · Replies 29 ·
Replies
29
Views
3K
Chemistry Entropy in isolated composite system for irreversible process
  • · Replies 3 ·
Replies
3
Views
2K