iN CONFINED SPACE ENTRY HOW MUCH OXYGEN MAY BE REQURIED

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THERMODYNAMIC - EXAMPLE 10.3 : According to Raoult's law, the pressure when vapor is completely condensed, P = x(1) P(1) + x(2) P(2) ... + x(n) P(n) when x(1), x(2) ... x(n) are the mole fractions of component 1, 2 ... n and P(1), P(2) ... P(n) are the vapor pressures of component 1, 2 ... n. A vapor at 74 degree Celsius containing 70 mole % water and 30 mole % ethanol is to be completely condensed. At the temperature of 74 degree Celsius vapor pressure is 0.38 atm for water and 0.97 atm for ethanol. What is the minimum pressure the compressor must be operated?

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Are you having any experience in antibody designing?

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what is the difference between PFR ,MFR and batch rector

1 Answers   BARC, CPCL,

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What does the catalystic converter on an automobile really do?

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Name the some common problems associated with bellow expansion joints?

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Explain how can you keep our seawater used for heat rejection clean before entering our heat exchangers?

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What are the different characteristics that can affect the flow of bulk solids and how?

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ENGINEERING ECONOMY - EXAMPLE 7.2 : In the purchase of a machine with a period n = 8.5 years, the minimum attractive rate of return, i = 12 %, the cost P = $55000, F = $4000 is the salvage, annual maintenance A = $3500. The return of the investment or equivalent uniform annual benefit is $15000. The equivalent uniform annual cost is P (A / P, i, n) + A - F (A / F, i, n). The investment is considered acceptable only when equivalent uniform annual benefit is greater than the equivalent uniform annual cost. From the compound interest table, (A / P, i = 12 %, n = 8 years) = 0.2013, (A / P, i = 12 %, n = 9 years) = 0.1877, (A / F, i = 12 %, n = 8 years) = 0.0813, (A / F, i = 12 %, n = 9 years) = 0.0677. Prove by calculations whether the investment above is acceptable.

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What fluid first to be lined up in a heat exchanger whether hot or liquid?why?

2 Answers   TCL,

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what is the role of a chemical engineer on a cement plant?

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What is the method of determining maximum differential pressure during hydro testing of shell and tube heat exchangers?

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