Go Back   Physics Help Forum > High School and Pre-University Physics Help > Thermodynamics and Fluid Mechanics

Thermodynamics and Fluid Mechanics Thermodynamics and Fluid Mechanics Physics Help Forum

Reply
 
LinkBack Thread Tools Display Modes
Old Sep 6th 2016, 01:24 PM   #1
Junior Member
 
Join Date: Apr 2016
Posts: 14
entropy quantification from T and V





The first image derives macro to micro formula relation for T change for entropy. The other image derives micro to macro formula relation for V change.

I will try to explain my problem: I get both theese derivations. Isolated they both relate entropy quantifiably from macro to micro and vice versa. My problem is how I can quantify a path of both V and T change for entropy and make it as an explanation for spontanity mathematically? In other words how can one prove mathematically how much T entropy change and V entropy change matter relative to each other and relative to spontanity. I know that entropy is a state function and hence path independent.

I think I will try to explain my problem further with an example:

For a volume expansion dS=KlnW_f-klnW_i and after that for a temperature change: dS=KlnW_f-klnW_i. Now I don't know why they are like this relative to each other that is the volume entropy change and the temperature entropy change. I need an explanation for how strong the entropy force from volume change is relative to the force from temperature change since entropy governs the force spontanity. In order to get the spontanity force I need to know all the forces in entropy. And I need a marthematical explanation.

Last edited by Torgny; Sep 6th 2016 at 01:36 PM.
Torgny is offline   Reply With Quote
Reply

  Physics Help Forum > High School and Pre-University Physics Help > Thermodynamics and Fluid Mechanics

Tags
entropy, quantification



Thread Tools
Display Modes


Similar Physics Forum Discussions
Thread Thread Starter Forum Replies Last Post
A problem on entropy burgess Advanced Thermodynamics 1 Jul 21st 2014 07:33 AM
Problem about entropy kelsiu Thermodynamics and Fluid Mechanics 2 Jul 9th 2014 06:03 PM
Entropy question Nrt Thermodynamics and Fluid Mechanics 1 Oct 12th 2011 09:42 AM
entropy evan.kimia Thermodynamics and Fluid Mechanics 1 May 2nd 2010 08:52 PM
Entropy einstein123 Energy and Work 3 Jan 4th 2009 06:58 AM


Facebook Twitter Google+ RSS Feed