Answer / kangchuentat

CHEMICAL MATERIAL BALANCE - ANSWER 2.5 : Basis = 100 mol / h. For inlet, mole % of carbon dioxide = 8 % and mole % of nitrogen = 100 - 8 = 92 % then mole ratio = 8 / 92 = 0.086957. For outlet, mole % of nitrogen = 92 %, mole % of carbon dioxide = 8 % (1 - 0.65) = 2.8 %, then mole ratio = 2.8 / 92 = 0.030435. (b) When x = 0.0000427, y = 1640 x = 1640 (0.0000427) = 0.070028, then mole ratio = y / (1 - y) = 0.0753. The answer is given by Kang Chuen Tat; PO Box 6263, Dandenong, Victoria VIC 3175, Australia; SMS +61405421706; chuentat@hotmail.com; http://kangchuentat.wordpress.com.

QUANTUM BIOLOGY - EXAMPLE 33.2 : (a) In a biomolecule, ATP hydrolysis will produce 3 kcal / mol to 60 kcal / mol of energy, according to energy scale. Find the range of such energy generation if 2 moles of molecules involved. (b) A formula is given by ln P = ln a + b ln W where P = metabolic rate, W = body size, a = dependent of taxa, b = scaling exponent. If b is approximately 1 for plant, and b is approximately 0.75 for animal, find the relationship of P as a function of a and W in plant.

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MASS TRANSFER - EXAMPLE 4.1 : A concentric, counter-current heat exchanger is used to cool lubricating oil. Water is used as the coolant. The mass flow rate of oil into the heat exchanger is 0.1 kg / s = FO. For oil, the inlet temperature TIO = 100 degree Celsius and the outlet temperature TOO = 55 degree Celsius. For water, the inlet temperature TIW = 35 degree Celsius and the outlet temperature TOW = 42 degree Celsius. What is the mass flow rate of water in kg / s, FW needed to maintain these operating conditions? Constant for heat capacity of oil is CO = 2131 J /(kg K) and for water is CW = 4178 J /(kg K). Use the equation (FO)(CO)(TIO ?TOO) = (FW)(CW)(TOW ?TIW).

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Why is a vacuum breaker used on shell and tube heat exchangers that are utilizing steam as the heating utility?

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Which type of drier is used for drying wet material?

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As a chemical engineer, which are the subjects to whom more importance should be given....for technical interview.

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How to caliculate the boil up rate, dia and height in both packed and tray distillation columns and any referance books for the design.

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ACCOUNTING AND FINANCIAL ENGINEERING - EXAMPLE 34.19 : In the purchase of a unit of engineering office, a loan has been made to a bank with the following details : Term N = 30 years; interest rate R = 8.07 % / year; security : primary residence; present value pv = $450000; salary = $75000 / year or $56000 / year after tax. (a) Let the discounted present value PV = [ 1 - 1 / (1 + r) ^ n ] / r for arrears, where r = interest rate of discount, n = number of payment, ^ = symbol for power. If the loan repayment was made monthly : (i) calculate the value of r where r = R / k and R is in decimal value; (ii) find the value of n where n = kN; (iii) estimate the value of k where k = number of repayment per year; (iv) calculate the value of PV based on the formula of discounted present value. (b) Calculate the monthly repayment of the loan, MR based on the following formula : pv = PV x MR. (c) Find the percentage of salary remains after paying the loan every month.

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Dear sir/madam I am in final year BE chemical engineering.Which companies i can apply .Please guide me.It is very helpful for me

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Explain how can you separate hydrogen peroxide into hydrogen and oxygen?

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AS PER IS(INDIAN STANDARD)RULES, IS INSTRUMENT EARTHING REQUIRE FOR INSRTUMENT WHICH IS ONLY 24V DC POWERED?

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Are there any alternatives to scraping a shell and tube if a capacity increase will make the pressure drop across the exchanger too large?

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Explain how can one estimate how the friction factor changes in heat exchanger tubes with a change in temperature?

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