and h 100 g/hr ots SYSTEM I risk na ath pa ero the bl ood ry is 2.5 sub the mass

Question

and h 100 g/hr ots SYSTEM I risk na ath pa ero the bl ood ry is 2.5 sub the mass reduced ving for th es 0.02 g SYSTEM 0.4 A w 0.5 Figure 3.1 Mass flows in three different SYSTEM III systems. A and B are com- pounds in the streams EXAMPLE 3.3 Determination of a Basis Problem: Determine a basis for each of the systems in Figure 3 Solution: In System I, a mass flow rate of 100 g/hr is given for stream 1. Therefore, the basis of 100 g/hr is selected for System I to solve for the flow rates of streams 2 and 3, as well with the s the flow rates of the individual components A and B in all three streams. can use this flow In System II, the mass flow rate of compound A in stream 1 is given. We rate of 1 g/s of compound A in stream 1 as the basis for all other calculations. of compound In System III, no amount or flow rate is given. However, the mass fraction serve as the A is given in streams 1 and 3. We can choose either stream-but not both-to flow rate basis. For example, we can arbitrarily define our basis such that stream 3 has a mass also of 10 lbm/hr. Therefore, the flow rate of compound A in stream 3 is 5 r. We could in have chosen a basis of 100 lbm/hr for stream 3. In this case, all of the calculated flow rates to the would have been a factor of 10 higher. Note that the ratios of any two streams each other constant. This is an example of how the results can be scaled of Mass Accounting

Explanation / Answer

ans) Ans. B) System 1, a mass flow rate of 100g/h is given for stream. Therefore, the basis of 100g/hr is selected for system 1. Therefore the basis of 100 g/hr is selected for system I to solve for the flow rates of stream 2 and 3, as well as the flow rates of the individual components A & B, in all three streams.

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