Open-System Energy Balances on Process Equipment

8 Open-System Energy Balances on Process Equipment 95 

Both the processes in this section can be considered polytropic. The isothermal expansion of an ideal gas follows Equation (2.49) with 7 = 1 while the reversible, adiabatic expansion of an ideal gas with constant heat capacity has y = k = c lc . Can you think of another example of a polytropic process  

TABLE 2.2 Summary of Expressions for Change in Internal Energy, Heat, and Work for an Ideal Gas Undergoing a Reversible Process 

In this section, we will examine examples of how to apply the first law to common types of process equipment. These systems will be analyzed at steady-state, when the properties at any place in the system do not change with time. Most cases will consist of one stream in and one stream out, which will be labeled streams 1 and 2, respectively. For these cases the mass balance becomes  

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OPEN-SYSTEM ENERGY BALANCES ON PROCESS EQUIPMENT... 

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