Loading in 5 sec....

Third Law of ThermodynamicsPowerPoint Presentation

Third Law of Thermodynamics

- 91 Views
- Uploaded on

Download Presentation
## PowerPoint Slideshow about ' Third Law of Thermodynamics' - kelsie-kidd

**An Image/Link below is provided (as is) to download presentation**

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript

Third Law of Thermodynamics

Third Law of Thermodynamics

No finite sequence of cyclic processes can succeed in

cooling a body to absolute zero.

Nernst Postulate (Weak Form)

The entropy change associated with any condensed

system undergoing a reversible isothermal process

approaches zero as temperature approaches 0 K,

where condensed system refers to liquids and

solids.

Walther Nernst

(1864 – 1941)

Nernst Postulate (Strong Form)

The entropy of all perfectly crystalline substances is

zero at absolute zero.

Max Planck

(1858-1947)

Entropy of Substances

Tabulated Results

Function of Molecular Size

Species So(298) J/K molSpecies So(298) J/K mol

Li 29.1 HF 173.7

Na 51.4 HCl 186.8

K 64.7 HBr 198.6

Rb 69.5 HI 206.3

Cs 85.2

Function of Molecular Complexity

Species So(298) J/K molSpecies So(298) J/K mol

NO 211 CH4 186

NO2 246 C2H6 230

N2O4 304 C3H8 270

C4H10 310

Download Presentation

Connecting to Server..