Thermodynamic equilibrium - thermodynamics, Mechanical Engineering

Thermodynamic equilibrium - Thermodynamics:

Equilibrium is the state of a system in which the state does not undergo any change in itself with the passage of time without the help of any external agent. Equilibrium state of system can be examined by observing weather change in state of system occurs or not. If no change in state of system happens then system is in equilibrium.

Let us consider a steel glass full of hot milk which is kept in open atmosphere. It is obvious that the heat from milk shall be continuously transferred to atmosphere till temperature of milk; glass and atmosphere are not same. During the transfer of heat from milk temperature of milk could be seen to decrease continually. Temperature gets some final value and does not change any more. This is equilibrium state at which the properties stop showing any change in them.

Generally, ensuring mechanical, chemical, thermal and electrical equilibriums of the system may ensure thermodynamic equilibrium of the system.

1. Mechanical Equilibrium: When there is no unbalanced force within system and nor at its boundaries then system is in mechanical equilibrium.

For a system to be in equilibrium there should not be any pressure gradient within the system that is equality of pressure for the entire system.

2. Chemical Equilibrium: When there is no chemical reaction taking place in system it is in chemical equilibrium.

3. Thermal equilibrium: When there is no temperature gradient within the system, system is in thermal equilibrium.

4. Electrical Equilibrium: When there is no electrical potential gradient within system, the system is in electrical equilibrium.

When all the conditions of chemical, thermal, mechanical, electrical equilibrium are fulfilled, the system is in thermodynamic equilibrium.

Posted Date: 10/15/2012 1:27:36 AM | Location : United States







Related Discussions:- Thermodynamic equilibrium - thermodynamics, Assignment Help, Ask Question on Thermodynamic equilibrium - thermodynamics, Get Answer, Expert's Help, Thermodynamic equilibrium - thermodynamics Discussions

Write discussion on Thermodynamic equilibrium - thermodynamics
Your posts are moderated
Related Questions
(a) What could be the characteristics of tool materials. (b) Describe several tool materials with their composition.

Determine the elongation of plate: Q: A steel bar AB which is having uniform thickness 2 cm, tapers from 1.5 cm to 7.5 cm uniformly in a length of 50 cm. From 1 st principle

What is the Maximum bolt bending moment in a group for four equally spaced bolts?

how to calculate Air velocity , pressure and power done by aircraft fans

Question 1 A metal rod has a diameter of 8.74 mm and supports a load of 24.6 kN. Calculate the value of true stress on the rod. The diameter was measured with the load already a

how will you detect the depth of sea and application?

Evaluate the maximum bending stresses: A beam of I-section illustrated in Figure is simply supported over a span of 10 m. It carries an uniform load of 4 kN/m over the whole s

Creating 3-d solid models Two basic approaches to create solid models are :    (i)  Constructive solid geometry (CSG or c-rep), and (ii)  Boundary representation (b-rep).

Isothermal Transformation: Austenite is not normally converted in martensite instantly but the procedure continues for some time. Various steels take various time for full tr

A 4- pole DC motor is known to have an armature resistance of 0.5 Ω, and is operated as a separately excited motor. (a)  When the motor is connected to a 250V DC supply with no