Specific heat capacity for a monocromatic gas

Click For Summary

Discussion Overview

The discussion revolves around the specific heat capacity of a monochromatic gas, exploring different approaches to understanding it beyond the traditional degree of freedom perspective. Participants consider both microscopic and macroscopic representations and the implications of temperature and state on specific heat capacity.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions whether there are alternative methods to consider specific heat capacity beyond the number of degrees of freedom, suggesting a formula for monochromatic gas.
  • Another participant asks if the inquiry is focused on a microscopic or macroscopic representation, noting that specific heat can vary with temperature and state.
  • A participant reiterates the formula for specific heat capacity and references the Einstein and Debye models for further understanding.
  • It is mentioned that heat capacity remains constant only after reaching a certain temperature, with a significant drop at low temperatures due to quantum effects.
  • A participant requests recommendations for resources to look up the Einstein and Debye explanations and formulas.

Areas of Agreement / Disagreement

Participants express differing views on the representation of specific heat capacity, with some focusing on macroscopic aspects while others hint at microscopic considerations. The discussion remains unresolved regarding the best approach to understanding specific heat capacity across different conditions.

Contextual Notes

There are limitations in the discussion regarding the assumptions made about temperature ranges and the applicability of different models, particularly in relation to quantum effects at low temperatures.

gemt
Messages
6
Reaction score
0
is there another way of considering the specific heat capaciaty of a material (many gas) other than with respect to the number of degrees of freedom with gives a constant out put for all monocrmatic gases for all temperature and pressure.

For a monocromatic gas c=(3/2)*n*R*m

where m = mass of particle
n = number of moles
R = gas constant

Any pointers in the right direction would be much appreciated.

Thank you.
 
Science news on Phys.org
Are you looking for just a microscopic representation or macroscopic? There are several ways of modeling a substance's specific heat that does vary with temperature and state. Unfortunately I don't know the science behind this (Im just an engineer) for the microscopic point of view only the macro.
 
gemt said:
(snip)For a monocromatic gas c=(3/2)*n*R/m
where m = mass of particle
n = number of moles
R = gas constant
(snip).

See Einstein and Debye plus heat capacity.
 
The heat capacity is only a constant value after and beyond reaching a certain temperature. At low temperatures, the value of the heat capacity rapidly drops off towards zero due to quantum effects. As someone mentioned see the Einstein/Debye explanation for more.
 
can anyone recommend the best place to llok the einstein debye explanation & formulas up please?
 

Similar threads

Replies
2
Views
3K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 22 ·
Replies
22
Views
4K
  • · Replies 32 ·
2
Replies
32
Views
4K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 28 ·
Replies
28
Views
3K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 2 ·
Replies
2
Views
992