Answer / kangchuentat

CHEMICAL ENERGY BALANCE - ANSWER 11.1 : i. A (moles of desired product formed) / (moles that would have been formed if there were no side reactions and the limiting reactant has reacted completely); ii. B (moles of desired product formed) / (moles of undesired product formed); iii. C (relative humidity 40 % means partial pressure of water vapour equals 4 / 10 of the vapour pressure of water at the system temperature); iv. D (moles of vapour) / (moles of vapour dry gas); v. E (mass of vapour) / (mass of dry gas). 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.

When specifying a cooling tower, should I look up historic wet bulb temperatures for my area or should I take measurements?

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How does hollow shaft impeller works? Does it based on principle of pitot tube?

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Explain how can one quickly estimate the additional pressure drop to be introduced with more tube passes?

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How can wet carbon dioxide be responsible for a corrosion problem in iron-containing metals?

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What do you know about us?

4 Answers   Allfon, Bhushan Power Steel, CPCL, Crystol, Trident,

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Explain the functioning of a three-way catalytic converter.

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QUANTUM BIOLOGY - EXAMPLE 33.7 : (a) In a DNA of a living cell, the quantum information available in the bases guanine (G) and thymine (T) are | G > = | 110 > and | T > = | 010 > respectively. Calculate | G > - | T >. (b) In a living biological cell, the step time for random walk of an electron is t. The localization time of an electron is T. If i is the geometric average of T and t, find log T as a function of t and i.

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A cylinder with a movable piston contains 0.1 mole of a monoatomic ideal gas. The piston moves through state a, b and c. The heat Q, changes from state c to a is 685 J. The work W, changes from state c to a is -120 J. The work, W performed from state a to b then to c is 75 J. By using the first law of thermodynamic, U = Q W where U is the internal energy : (a) Determine the change in internal energy between states a and c. (b) Is heat added or removed from the gas when the gas is taken along the path abc? (c) Calculate the heat added or removed when the gas is taken along the path abc?

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what are the chemicals used in PFR and MFR to Process?

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How can you determine the largest impeller that a pump can handle?

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Name some common problems associated with dilute phase pneumatic conveying?

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BIOCHEMICAL ENGINEERING INSTRUMENTATION - EXAMPLE 29.1 : In the application of Theory of Spectrometry in spectrophotometer, let n = N x C x V, V = A x t, e = a x N where n = number of molecules, N = Avogadro's number, V = volume of cuvette, A = area of cuvette, t = thickness of cuvette, C = concentration of fluid in the cuvette, e = extinction coefficient, a = effective area of molecule. (a) By using calculus in dI = -I x a x N x C x dt, prove that ln (I / Io) = -a x N x C x t, where dI is the small difference in I and dt is the small difference in t. I = intensity of light. Io = initial intensity of light. (b) Show by calculations that ln (Io / I) = e x C x t based on the answer in the previous question (a). (c) Find the equation of log (Io / I) as a function of e, C and t based on the answer in the previous question (b).

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