What is negative heat capacity ?

Click For Summary
SUMMARY

Negative heat capacity is a phenomenon where adding energy to a system results in a decrease in temperature, and conversely, removing energy causes an increase in temperature. This concept is exemplified by black holes and certain paramagnetic systems at low temperatures under constant pressure. Additionally, any gravitationally bound system can exhibit negative heat capacity. This behavior challenges traditional thermodynamic principles, particularly the conservation of energy.

PREREQUISITES
  • Understanding of thermodynamics principles
  • Familiarity with black hole physics
  • Knowledge of paramagnetic materials
  • Basic concepts of gravitational systems
NEXT STEPS
  • Research the thermodynamic properties of black holes
  • Explore the behavior of paramagnetic systems at low temperatures
  • Study gravitationally bound systems and their thermodynamic implications
  • Investigate the implications of negative heat capacity in theoretical physics
USEFUL FOR

Physicists, students of thermodynamics, and researchers interested in advanced concepts of energy systems and black hole thermodynamics.

magnetar
Messages
83
Reaction score
0
what is" negative heat capacity"?

what is "negative heat capacity"? what is the example of it?
 
Science news on Phys.org


I can't imagine there would be such a case! For a negative heat capacity would imply that as you put more energy into a system, the system gets colder. Or as you take energy away from a system the system gets hotter. Both of these scenarios violate conservation of energy. AFAIK.

But, I haven't studied all of physics, so correct me if I'm wrong...
 


1) Negative heat capacity is simply when as you put energy into a system, its temperature decreases
2) One example is a black hole... I cannot think of any others.
 


i believe there are certain paramagnetic systems that have negative heat capacity (with constant pressure) at low temperatures.
 


Any gravitationally bound system will have negative heat capacity - it doesn't have to be a black hole.
 
  • Like
Likes   Reactions: madscientist_93 and HossamCFD


nealh149 said:
i believe there are certain paramagnetic systems that have negative heat capacity (with constant pressure) at low temperatures.

Can you give a reference for this? I thought gravitationally bound systems were the only example, and would like to learn more.
 

Similar threads

Undergrad Understanding Heat Capacity and Work: Clarifying Misconceptions
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Help understanding "Heat capacity"
  • · Replies 28 ·
Replies
28
Views
3K
Undergrad Questions about my Understanding of Thermodynamics and Statistical Mechanics
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad A query about heat capacity and specific heat capacity
  • · Replies 8 ·
Replies
8
Views
2K
Graduate What is the heat capacity of water in meta-stable equilibrium?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Cannot understand formula for molar heat capacities of an ideal gas
  • · Replies 22 ·
Replies
22
Views
3K
Undergrad How to understand experiment to measure heat capacity of solid?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Is Heat Capacity Derivable for Non-Ideal Liquid Mixtures?
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Entropy and Heat Capacity Relation
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Negative heat capacity and thermal reservoir
  • · Replies 3 ·
Replies
3
Views
1K