User Account

All Pages

Define Thermal equilibrium, Other Engineering

Assignment Help:
Thermal equilibrium
The definition and measurement of temperature must be logically preceded by the concept of thermal equilibrium and the Zeroth law. To determine operationally whether two systems are in thermal equilibrium, they are placed together in contact and isolated from the surroundings. If one of them is hot and the other cold then, after a certain period of time, the former feels less hot and the latter feels less cold. Simultaneously, changes in their physical properties, such as length, electrical resistance, etc. occur. After a sufficiently long time (equivalent to the relaxation time) no further changes take place. The two systems are then said to be in thermal equilibrium; they are said to have the same temperature.
Definition
Two systems are equal in temperature if no change in any physical property occurs when they are brought into communication. This definition must not be reversed. It does not imply that “when two systems are equal in temperature, no changes result from their communication”. For instance, if an electric lamp and a battery are connected by means of an electrical conductor, then the lamp will light up; this is, of course, a work interaction. Temperature is at the heart of the difference between work and heat; hence, the necessity to employ rigour in defining concepts relating to temperature. Two points are of significance with reference to the discussion on thermal equilibrium and equality of temperature:
• If the definition of temperature equality has to be given in such a manner as to apply equally well when it is reversed, the following condition should be added : “in the absence of any work interactions”.
• The process of “communication” indicated in the definition is in fact “thermal” communication (excluding any “work interactions”). But this usage leads to circularity and hence is not employed until after temperature equality is defined.

Related Discussions:- Define Thermal equilibrium

Evacuation of a high rise building - means of escape, Evacuation of a high ...

Evacuation of a high rise building - means of escape: Evacuation of a high rise building is likely to be split into two or more phases.  Initially, when the alarm activates (f

Need answers in an excel spreadsheet, 1 Scott Investors, Inc., is consideri...

1 Scott Investors, Inc., is considering the purchase of a $447,000 computer with an economic life of five years. The computer will be fully depreciated over five years using the st

Physics, what is electrical transmission and electromagnetic radiation in t...

what is electrical transmission and electromagnetic radiation in the form of energy transfer?

Arinc decoding word, how to decode arinc 429 words and send result to pc by...

how to decode arinc 429 words and send result to pc by rs232 bus

P d c, what are clippers

what are clippers

patch antenna, how to make patch antenna for wifi applicatoi

how to make patch antenna for wifi applicatoin

System dynamics , System Dynamics  Crucial to the development of a guid...

System Dynamics  Crucial to the development of a guidance system is an understanding of the dynamics of the system. In particular, it is necessary to understand how the acceler

Pn junction diode, Solving Poisson''s equation find out electric field in t...

Solving Poisson''s equation find out electric field in the transition region and show that electric field is maximum at the junction of p-n diode

Structural engineering, The closed form solutions for ?max and Mmax are giv...

The closed form solutions for ?max and Mmax are given on page 16.1-276 for several axial loads. Figure C-C2.2 summarizes the results for the first benchmark problem and Figure C-C2

Surveying, Write short notes on the overcoming the following obstucal with ...

Write short notes on the overcoming the following obstucal with good leblel diagram 1 RIVER 2.BUILDING 3.DAM

Write Your Message!

Captcha
Order Assignment

Featured Services

Order Now

Popular Subjects

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +1-415-670-9521

Phone: +1-415-670-9521

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd