Calculation of Ideal Work

The slraft work, (rev), is here the work of a completely reversible process. If given tire name ideal work, H deai. the preceding equation may be rewritten  

In most applications to chemical processes, the kinetic- and potential-energy terms are negligible compared witli tire otliers in tins event Eq. (5.24) reduces to  

For tile special case of a single stream flowing tlirough the control volmne, Eq. (5.25) becomes  

Division by in pnts this eqnation on a nnit-mass basis  

A completely reversible process is hypothetical, devised solely for determination of the ideal work associated with a given change of state. 

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Calculation of Ideal Work If changes in kinetic and potential energies are neglected, Eq. (4-360) is apphcable. From the tabulated data,... 

It is never necessary to describe hypothetical processes devised for calculation of ideal work. All that is required is the realization that such a proce may always be imagined. The equation for ideal work is developed with compl generality in the following paragraphs from the first and second laws and listed requirements of reversibility. 

Calculation of Ideal Work If changes in kinetic and potential... 

Our objective is to compare the actual work of a process with the work of the hypothetical reversible process. No description is ever required of hypothetical processes devised for the calculation of ideal work. One need only reahze tliat such processes may always be imagined. Nevertlieless, an illustration of a hypothetical reversible process is given in Ex. 5.7. 

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