Get quote & make Payment
Define Thermal equilibrium, Other Engineering
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.
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.
Posted Date: 6/27/2012 5:10:49 AM | Location : United States
Ask an Expert
Define Thermal equilibrium, Assignment Help, Ask Question on Define Thermal equilibrium, Get Answer, Expert's Help, Define Thermal equilibrium Discussions
Write discussion on Define Thermal equilibrium
Your posts are moderated
Write your message here..
Electronics engineering, about clipping and clamping circuits
about clipping and clamping circuits
Basic instrumentation system, A basic instrumentation system consists of a ...
A basic instrumentation system consists of a transducer, conditioning amplifier, and analog digital converter connected (in general) by analog and digital transmission lines.
Jfet self biasing, VDD=20V,RG=1MOHM,RD=3.3KOHM,RS=1KOHM,IDSS=8MA,VP=-6VFIND...
Active clearance control system, Active clearance control system The sy...
Active clearance control system The system provides fan discharge air for cooling the core compartment and the low-pressure turbine case. At low altitudes the core engine requ
Testing permeability of moulding sand, Q. Describe the complete procedure o...
Q. Describe the complete procedure of testing permeability of moulding sand. How is permeability influenced by various parameters of the moulding sand ? Ans. Permeability
Speed control in aircraft engine, Speed control in Aircraft Engine: Bec...
Speed control in Aircraft Engine: Because the APU is designed to run at a constant rpm, some means must be provided to control this speed. Such a control device is known as a
Fire protection test, Go to https://blackboard.newhaven.edu/ user: user:...
Go to https://blackboard.newhaven.edu/ user: user:Aaldo6 Pass:1992May239645 Class: fire 2209 Occup safety$ hilt-fire take the test its one hour test multiple choices its due t
Positive seris clipper, limitation of seris clipper experiment
limitation of seris clipper experiment
Nash equilibrium, how to get ns2 coding for nash equilibrium
how to get ns2 coding for nash equilibrium
Derive, derive the power in case of r-l circuit
derive the power in case of r-l circuit
Accounting Assignment Help
Economics Assignment Help
Finance Assignment Help
Statistics Assignment Help
Physics Assignment Help
Chemistry Assignment Help
Math Assignment Help
Biology Assignment Help
English Assignment Help
Management Assignment Help
Engineering Assignment Help
Programming Assignment Help
Computer Science Assignment Help
IT Courses and Help
Why Us ?
~24x7 hrs Support
~Quality of Work
~Time on Delivery
~Privacy of Work
Human Resource Management
Literature Review Writing Help
Follow Us |
T & C
Copyright by ExpertsMind IT Educational Pvt. Ltd.