Simplified energy balance

B Write the simplified energy balance for the following processes. List and number each assumption or decision made in the simplification. 

Given a description of any nonreactive process for which tabulated specific internal energies or specific enthalpies are available at all input and output states for all process species, (a) draw and completely label a flowchart, including Q and W (or Q and for an open system) if their values are either specified or called for in a problem statement (b) perform a degree-of-freedom analysis and (c) write the necessary equations (including the appropriately simplified energy balance) to determine all requested variables. 

Write the simplified energy balances for the following changes ... 

Figure 8. Simplified energy balance for the pyrolysis of municipal refuse in the...

Two forms of simplified energy balance for stirred-tank reactor... 

A simplified energy balance for the coal particle is given by... 

The method of solution for adiabatic reactions presented here will be for the simplified case in which it may be assumed that A Ty and ASt are relatively constant over the temperature range involved. If this is the case, a plot of log K versus l/T will result in a straight line. The calculation involves two relationships between T and the degree of conversion. One is a simplified energy balance the other is the relation involving the equilibrium constant. The procedure is as follows ... 

SIDE NOTE Simplified Energy Balance l j and Temperature Expression... 

The general (simplified) energy balance can be obtained according to Appendix C from Eq.(C.26), where we neglect kinetic, potential (and electromagnetic) energy accumulated in the node. The other simplifying hypotheses are the same as in Sections C.4 and C.5. Hence in place of the balance (5.1.3) with (5.1.2) we finally have... 

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