problem 1 In very hot, humid climates, such as those in tropical jungles, surfac

Question

problem 1

In very hot, humid climates, such as those in tropical jungles, surface water is rarely safe to drink. A military campaign in such a place where the temperature is 100oF and the relative humidity is 98% proposes to produce safe drinking water by cooling the air to 50oF and collecting the condensate for drinking.If each soldier requires one gallon of drinking water per day in such a hot climate, what volume of air (at its existing temperature and pressure) must be processed per soldier per day? State any assumptions.

problem 2

   Data for the specific gravity of water/isopropyl alcohol solutions are tabulated in Table 2-114 of Perry’s Chemical Engineering Handbook – 7th edition. (The same data are tabulated in other editions of Perry’s Handbook though the Table numbers may differ.) . If you use data from a source other than Perry’s Handbook, give the reference.

     What is the Heat of Formation?

     Rubbing alcohol, widely available in grocery and drug stores, is a 70 wt. percent solution of isopropyl alcohol in water. What is the specific gravity of this solution at ambient temperature?

     Determine the percent error in the specific gravity calculated by assuming that the volumes are additive?

     Does the volume increase or decrease of mixing

Explanation / Answer

yes, volume increase on mixing. Since the volumes are additive.

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