Why can substances with endothermic heat of solution dissolve?

  • Thread starter Thread starter STEMucator
  • Start date Start date
  • Tags Tags
    Endothermic
Click For Summary
A substance with an endothermic heat of solution can dissolve due to the balance between enthalpy and entropy changes. While the dissolution process absorbs heat, leading to a decrease in temperature, the increase in entropy during the mixing of solute and solvent contributes to the overall spontaneity of the process. The Gibbs free energy change (ΔG) is crucial, as it determines whether a reaction will occur. It is expressed as ΔG = ΔH - TΔS, where ΔH represents the heat absorbed, T is the temperature, and ΔS is the change in entropy. Even with an endothermic reaction, if the entropy increase (ΔS) is significant enough, it can drive the dissolution process forward, making it thermodynamically favorable despite the initial cooling effect.
STEMucator
Homework Helper
Messages
2,076
Reaction score
140
Why is a substance with an endothermic heat of solution able to dissolve?

Is it due to the activation energies being reached (forming activated complexes)? If so then I'm guessing this has to do with temperature.
 
Chemistry news on Phys.org
Solution gets cold, but the entropy grows. After all it is ΔG that is a driving force, and ΔG = ΔH - TΔS.
 

Similar threads

Replies
4
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 9 ·
Replies
9
Views
3K
Replies
2
Views
3K
  • · Replies 5 ·
Replies
5
Views
7K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 4 ·
Replies
4
Views
3K
Replies
11
Views
2K
  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 4 ·
Replies
4
Views
4K