Liquids problems

The following text will give you a walkthrough of the use of this spreadsheet and the McCabe-Thiele equilibrium curve. MTPlot72 is applicable as a template in solving any liquid-liquid problem. 

Sometimes, fixed assets are purchased via short-term loans, which can lead to liquidity problems. For the most part, fixed assets should be financed from long-term or permanent capital such as stocks or bonds. The proven ability of management to handle working capital efficiently will put a company in a better position to obtain such longterm capital when required, because the confidence of bankers and stockholders will have been obtained. 

Consequently, at least one of the phases will be a nonsimple mixture. In most vapor-liquid problems both phases will be nonsimple mixtures, in that species with pure component vapor pressures greater than the system pressure appear in the liquid phase, and those with vapor pressures less than the system.pressure appear in the vapor phase. 

Ignoring the change in atmospheric pressure in Torricelli s equation for air and water causes an error of less than 0.1 percent (much less than the error introduced by some of the other assumptions). We are justified in leaving out this term if the ratio of the density of the surrounding fluid to that of the flowing fluid, pjp., is much less than 1. This is true in most hydraulics problems but not in two-liquid problems (Probs. 5.13 and 5.14). 

Therefore, requests for early repayment by more than 40 percent of the debtors could be met. Hence, no liquidity problems are likely to arise, and advantage can be taken of discounts for early payment. Also, the current debt could be met by sale of the inventory, which takes (0.140 As/As)(365), or 51 days. The quick ratio is 1/2.45 = 0.407. 

The methods presented in previous sections can be combined to attack multiphase equilibrium problems. To illustrate, we combine the gamma-phi method wi the gamma-gamma method to solve three-phase, vapor-liquid-liquid problems. We again choose to pose these problems as analogies to isothermal flash calculations, as in 11.1.5. Then such problems are well-posed when we have specified values for T independent properties, where T is given by (9.1.12) with S = 0,... 

The processes discussed in this chapter demonstrate the great variety of phase equilibrium that can arise beyond the basic vapor-liquid problems discussed in most of the previous chapters. Many other systems could be included The adsorption of gases onto solids (used in the removal of pollutants from air), the distribution of detergents in water/oil systems, the wetting of solid surface by a liquid, the formation of an electrochemical cell when two metals make contact are all examples of multiphase/multicomponent equilibrium. They all share one important common element their equilibrium state is determined by the requirement that the chemical potential of any species must be the same in any phase where the species can be found. These problems are beyond the scope of this book. The important point is this The mathematical development of equilibrium (Chapter 10) is extremely powerful and encompasses any system whose behavior is dominated by equilibrium. 

I o reduce the gas-liquid problem to the previous one of ferromagnet (Baxter, 1982), Oi and s, should be related by... 

Working Capital Fund shall mean a fund designed to meet short-term liquidity problems. 

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