Sudden change in thermodynamic system.

In summary, sudden changes can occur in thermodynamic systems, specifically near phase transition points. These changes are characterized by sudden and rapid heat flux and can be seen in phenomena such as bubbles of vapor forming near the boiling point of water. Classical thermodynamics does not account for dynamics and time, but local thermodynamic equilibrium can be reached quickly in these sudden changes, giving meaning to thermodynamic quantities like temperature.
  • #1
Aristarchus0
1
0
Do sudden changes occur in thermodynamic systems? If so, when do they occur and why?

More specifically: When a system is nearing thermodynamic equilibrium, will the process always be slow, gradual, and uniform; or do sudden changes — sudden jumps — sometimes occur?
 
Science news on Phys.org
  • #2
Classical thermodynamics has nothing to say about *dynamics*- time is not part of the formulation.

There is always fluctuations in physical variables (governed by the fluctuation-dissipation relation), and there is a difference between global measures of equilibrium and local measures of equilibrium (local thermodynamic equilibrium)- Boltzman's transport equation is a statistical mechanical equation, but the idea is that locally, equilibrium can be reached quickly, giving meaning to thermodynamic quantities like "temperature" when there is a sudden and rapid heat flux.
 
  • #3
The sudden changes take place in thermodynamic systems near phase transition points. For example, bubbles of vapor quickly grow near the boiling point of water.
 

1. What causes a sudden change in a thermodynamic system?

A sudden change in a thermodynamic system can be caused by various factors, such as an external force, a change in temperature or pressure, or a chemical reaction. These changes can disrupt the equilibrium of the system and cause a sudden shift in its thermodynamic properties.

2. How does a sudden change affect the stability of a thermodynamic system?

A sudden change in a thermodynamic system can lead to a decrease in its stability. This is because the system is no longer in equilibrium and may have to undergo internal adjustments to reach a new equilibrium state. The extent of this destabilization depends on the magnitude of the change and the properties of the system.

3. Can a sudden change in a thermodynamic system lead to irreversible changes?

Yes, a sudden change in a thermodynamic system can lead to irreversible changes. This can occur if the system undergoes a phase change or if the change is drastic enough to cause significant chemical reactions. In such cases, the system may not be able to return to its original state even if the external conditions are restored.

4. How can sudden changes in a thermodynamic system be prevented?

Sudden changes in a thermodynamic system can be prevented by carefully controlling the external conditions, such as temperature and pressure, and by maintaining the system in a state of equilibrium. This can be achieved through proper insulation, monitoring, and regulation of the system.

5. What are some real-life examples of sudden changes in thermodynamic systems?

Sudden changes in thermodynamic systems are common in our daily lives. For example, boiling water suddenly turns into steam when heated, ice cubes suddenly melt when taken out of the freezer, and hot air balloons suddenly lift off when heated. These are all examples of changes in thermodynamic systems due to external factors such as heat transfer and pressure changes.

Similar threads

Replies
11
Views
284
Replies
12
Views
1K
Replies
5
Views
2K
  • Thermodynamics
Replies
3
Views
992
Replies
56
Views
3K
Replies
13
Views
1K
Replies
16
Views
827
Replies
15
Views
1K
Replies
2
Views
452
Back
Top