Concepts and definitions of thermodynamics, Civil Engineering

System

A system (often called a closed system) is any collectionof matter within a prescribed boundary, but no matter may enter or leave the system. 

Note

1. That the boundary may be real or imaginary and theshape of the boundary can change E.g.

604_concept of thermodynamics.png

2167_concept of thermodynamics1.png

2. Different parts of the system may be at different temperatures, pressures and velocities and may contain different sorts of matter.

3. If a fluid is passing steadily through a reservoir so thatthe mass in the reservoir is constant, we still can notconsider the reservoir as a system. Matter is crossing the boundary.

1370_concept of thermodynamics2.png

4. A system only has two kinds of interaction with itssurroundings.   Work and Heat. 

1765_concept of thermodynamics3.png

Positive WORK is done by a system, during a given operation, when the sole effect external to the systemcould be reduced to the rise of a weight. 

1185_concept of thermodynamics4.png

Posted Date: 8/27/2012 8:59:13 AM | Location : United States







Related Discussions:- Concepts and definitions of thermodynamics, Assignment Help, Ask Question on Concepts and definitions of thermodynamics, Get Answer, Expert's Help, Concepts and definitions of thermodynamics Discussions

Write discussion on Concepts and definitions of thermodynamics
Your posts are moderated
Related Questions
what are the names of differemt types of doors

which section is most effective for a design of beam and why

What is the working capacity of a road paver per hour for bituminous macadam

what is gis system



Q. Purpose of reinforcement in concrete roads? The major purposes of reinforcement in concrete roads are: (i)  To control the development and pattern of cracks in concrete p

any new innovative metods to protct building from disater

1. Determine a network diagram method that uses only finish-to-start relationships and may use dummy activities to define logical relationships.  2.  Precedence diagr

what is the total volume required for the gravel material of 6.5mx2314mx0.1m with a relative density of 2.919 and a loose bulk density of 1668kg/m3