Monday 25 December 2017

Work Transfer

1) work is one of the basic modes of energy.
2) Force is not a form of energy, only it transmitts an effect from one body to another.
3) work is done by the system is taken as positive.
4) Work done on the system is taken as negative.
5)Its unit is Nm or joule. (1Nm=1joule)
6)Power:- The rate at which the work is done by or upon the system is known as power. Its unit is J/sec or watt.
7)work is a path function.
8)Work done is a quasi static process.
9) The differential of path function is imperfect or inexact differential.
10)Thermodynamic properties are point function and its differential are exact or perfect differential.
11) The cyclic integral of the thermodynamic properties are zero because thermodynamic properties are point function . So, the initial and final position are same. So their differences is zero.

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