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Topic :: Mass
Question 40 - A stream with volumetric flow rate Q enters a cylindrical tank and a stream with volumetric flow rate q exits the tank. The fluid has a constant heat capacity and density. There is no temperature change or chemical reaction occurring in the tank. Develop a model for determining the height of the tank, h. Let V is the volume, A is the cross sectional area, r is the density, m is the mass, where V and A are for the tank, r and m are for the fluid. The rate of mass of fluid accumulation, dm / dt = (Q - q) r. Prove the model to be dh / dt = (Q - q) / A.
1 2673Question 48 - Let a ^ 2 = a x a and a ^ 3 = a x a x a where ^ is power function. Niobium is a metal with a body-centered cubic structure. The length of the unit cell structure is b = 0.3349 nm. (a) Find the volume for a unit cell structure for niobium. (b) There are 2 atoms per unit cell structure of niobium. The metal has a molar mass of 92.9 g / mol. One mole of the metal consists of 6.02 x 10 ^ 23 atoms. Find the mass of niobium per unit cell and the density of niobium.
1 2672Question 51 - A batch reactor is designed for the system of the irreversible, elementary liquid-phase hydration of butylene oxide that produces butylene glycol. At the reaction temperature T = 323 K, the reaction rate constant is k = 0.00083 L / (mol - min). The initial concentration of butylene oxide is 0.25 mol / L = Ca. The reaction is conducted using water as the solvent, so that water is in large excess. (a) Let the molecular weight of water is 18 g / mol and the mass of 1 kg in 1 L of water, calculate the molar density of water, Cb in the unit of mol / L. (b) Determine the final conversion, X of butylene oxide in the batch reactor after t = 45 min of reaction time. Use the formula X = 1 - 1 / exp [ kt (Cb) ] derived from material balance. (c) Find the equation of t as a function of X.
1 2946Question 61 – A biochemical trolley of mass 15 kg is towing a trailer of mass 5 kg along a straight horizontal pathway. The trailer and the trolley are connected by a light inextensible tow-bar. The engine of the trolley exerts a driving force of magnitude 100 N. The trailer and the trolley experience resistances of magnitude 10 N and 30 N respectively. (a) Form 2 equations with unknowns T and a, that represents the equilibrium for the 2 systems of the trolley and trailer. (b) Solve the simultaneous equations from the 2 equations that are obtained in part (a) of this question. T is the tension of the tow-bar and a is the acceleration.
1 2335Question 73 - (a) A dryer reduces the moisture content of 100 kg of a potato product from 80 % to 10 % moisture. Find the mass of the water removed in such drying process. (b) During the drying process, the air is cooled from 80°C to 71°C in passing through the dryer. If the latent heat of vaporization corresponding to a saturation temperature of 71°C is 2331 kJ / kg for water, find the heat energy required to evaporate the water only. (c) Assume potato enters at 24°C, which is also the ambient air temperature, and leaves at the same temperature as the exit air. The specific heat of potato is 3.43 kJ / (kg °C). Find the minimum heat energy required to raise the temperature of the potatoes. (d) 250 kg of steam at 70 kPa gauge is used to heat 49,800 cubic metre of air to 80°C, and the air is cooled to 71°C in passing through the dryer. If the latent heat of steam at 70 kPa gauge is 2283 kJ / kg, find the heat energy in steam. (e) Calculate the efficiency of the dryer based heat input and output, in drying air. Use the formula (Ti - To)/(Ti - Ta) where Ti is the inlet (high) air temperature into the dryer, To is the outlet air temperature from the dryer, and Ta is the ambient air temperature.
1 5885Question 78 - Fact 1 : Dry air contains 20.95 % oxygen, 78.09 % nitrogen, 0.93 % argon, 0.039% carbon dioxide, and small amounts of other gases by volume. Fact 2 : Volume occupied is directly proportional to the number of moles for ideal gases at constant temperature and pressure. Fact 3 : 12.5 moles of pure oxygen is required to completely burn 1 mole of pure octane. Fact 4 : Air–fuel ratio (AFR) is the mass ratio of dry air to fuel present in a combustion process such as in an internal combustion engine or industrial furnace. Fact 5 : Molecular weight of oxygen gas is 31.998 g / mole and molecular weight of nitrogen gas is 28.014 g / mole. (a) Find the molar ratio of nitrogen and oxygen, or (moles of nitrogen) / (moles of oxygen) in dry air, by assuming ideal features of nitrogen and oxygen gases. (b) How many moles of nitrogen are available if dry air is used to completely burn the 1 mole pure octane? (c) Find the mass of fuel of 1 mole of octane with molecular weight of 114.232 g / mole. (d) Find the mass of dry air with 12.5 moles of pure oxygen by assuming only oxygen and nitrogen gases exist in the air. (e) Find the air-fuel ratio (AFR) when octane is used as fuel. (f) Find the fuel-air ratio (FAR) when octane is used as fuel.
1 2642CHEMICAL MATERIAL BALANCE - EXAMPLE 2.1 : Two methanol-water mixtures are contained in separate tanks. The first mixture contains 40.0 wt % methanol and the second contains 70.0 wt % methanol. If 200 kg of the first mixture is combined with 150 kg of the second, what are the mass and composition of the product? The symbol of weight percent is wt %.
1 2383Question 80 - Liquid octane has a density of 703 kilograms per cubic metre and molar mass of 114.23 grams per mole. Its specific heat capacity is 255.68 J / (mol K). (a) Find the energy in J needed to increase the temperature of 1 cubic metre of octane for 1 Kelvin. (b) At 20 degree Celsius, the solubility of liquid octane in water is 0.007 mg / L as stated in a handbook. For a mixture of 1 L of liquid octane and 1 L of water, prove by calculations that liquid octane is almost insoluble in water.
1 2964Question 82 - (a) The Hyperion sewage plant in Los Angeles burns 8 million cubic feet of natural gas per day to generate power in United States of America. If 1 metre = 3.28084 feet, then how many cubic metres of such gas is burnt per hour? (b) A reservoir of natural gas produces 50 mole % methane and 50 mole % ethane. At zero degree Celsius and one atmosphere, the density of methane gas is 0.716 g / L and the density of ethane gas is 1.3562 mg / (cubic cm). The molar mass of methane is 16.04 g / mol and molar mass of ethane is 30.07 g / mol. (i) Find the mass % of methane and ethane in the natural gas. (ii) Find the average density of the natural gas mixture in the reservoir at zero degree Celsius and one atmosphere, by assuming that the gases are ideal where final volume of the gas mixture is the sum of volume of the individual gases at constant temperature and pressure. (iii) Find the average density of the natural gas mixture in the reservoir at zero degree Celsius and one atmosphere, by assuming that the final mass of the gas mixture is the sum of mass of the individual gases. Assume the gases are ideal where mole % = volume % at constant pressure and temperature.
1 2654MASS 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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Which products are available in the Mass Systemswitch and System Manager AC range?
The elution volume of an enzyme on a gel filtration column can be predicted from a) its enzyme activity b) its protein absorbance at 280 nm c) subunit composition and monomer molecular mass(es) d) Choices a) and b) are both correct.
How a balanced equation can be used to find the mass or volume of an unknown quantity in a stoichiometry?
Process of resolving a specific problem Problem helps to enhance your ability to live life happily. Yes, it looks stupid when somebody say something like this. But it is true. If you say, “how?” I explain how. When there is a problem in ones life, he tries to solve it. Once he solves the problem the satisfaction of solving the problem which he feels has no words. You can see it in his eyes, on his face, in his footsteps, and not the least all around where he is. So tell me, it works? So never give up in your life. Live the life with problem, because life’s other name is problem. No one on the earth saying he or she has no problem. One who does not say that I have problem but try hard to solve the problem is the person who live life happily. There are two system of solving the particular problems. One is: solve intuitively. Two is: solve systematically. From my point of view, solving the problem systematically is much easier, more balanced and logical. To solve the problem systematically there are some instruction like relaxing head for some time, think on problem and the solution. One must not mix two things together in such a way that you can not differentiate them. If essential, there should be different solutions for different problems. In solve problem systematically, one come across five types of questions or we can view it as steps to solve the problem. They are: 1 What are the sources of problem is means “establish the goal”: “To live is to have problems and to solve problems is to grow intellectually.” (J. P. Guilford) No problem exists in the absence of an objective. We need to know exactly what and where we want to arrive at in order for us to properly determine our track and direction. Knowing our direction is an important aspect in problem solving, as what Diana Ross said, “Do you know where you’re going to?” 2 What the problem is exactly means “identify and define the problem”: “Microsoft is company that manages imagination” (Bill Gates). It is definitely related to imagination i.e. asking ourselves what is the problem and to seek to understand more why we think there is the problem is recognized what caused it in order for us to get an objective. 3 What are the solutions of problem means “set your priorities”: “The best way to get a good idea is to get a lot of ideas” (Linus Pauling) Bifurcation between which solutions are “must” and which are “want” is difficult task. The solution which must be taken to solve the problem is listed out. Therefore it is said that “the only joy in the world is to begin.” (Cesare Pavese). 4. Which solution is best among all means “brainstorm for solution”: “That human mind is like a parachute – it functions better when it is open.” (Cole’s Rules) As per this narration, I can say that brainstorm for the solution to the problem is must. When you ask for the opinion of other, you can decide upon what to do and don’t. 5. What action to be taken to solve the problem means “plan your course of action”: “It is not enough to just do your best or work hard. You must know what to work on” (W. Edwards Deming). Plan your course of action with regard to the resources needed to implement the solution. In Living a Life That Matters, Harold S. Kushner (the Massachusetts rabbi whose best selling books include When Bad Things Happen to Good People) suggests that the most successful lives are the ones that most effectively manage and resolve that problem. In a nutshell, to solve the particular problem, Rene Descartes says that “It is not enough to have a good mind; the main thing is to use it well.” FIND OUT GRAMMATICAL ERROR?
What is the use of mass mapping?
my qualification is b.tech- industrial biotech. i was read about many chemical engineering subject as a allied like unit operation, chemical thermodynamics, chemical reaction engineering , mass transfer and separation, downstream processing and principle of chemical engineering. and i have 2 yrs working exprience on in the field of instrumentation and control... and my query is "can i able work as process technologist" and which subject i want conc. more?........
Wt is the use of mass mapping?
y we do not differ b/w atomic mass and atomic wieght? from engrtauseef2008@gmail.com
Giraffe in Arabic means "the highest of all." The height of a giraffe is an average of 5 m, its mass is about 800 kg and hooves is an area of approximately 625 cm2. Using a straw from a material nedeformabil a giraffe trying to drink water from a lake, not to condescend. What is the ratio of the minimum pressure to be applied giraffe, mouth, at the end paiului to drink water and pressure of giraffe on the ground. The density of water. g = 10 m/s2
Define the signaling massage in telecomincation
how to calclate the SHUTTERING TAKEN CONCRETE LOAD? WHAT IS THE LOAD BEARING CAPACITY IN STEEL SHUTTERING PLATE? WHAT IS THE CONCRETE LOAD IN (MASS) IN THE SHUTTERING PLATE. PLATE SIZE IS 120CM* 90CM CONCRETE WALL LENGTH IS 10M ,WIDE IS 60CM, HEIGHT IS 1.2M PLS TO SENT THE CALCULATION.
In Telecom, While call set up what are the Masseges will flow from all network element to each other.
wat is mass allocation and when it is used
can u deactivate my music massage from mobily? some times i recharge my a/c then after sometimes one massage come and sr.4/- debited from my account. so please help me stop the massage about music or what. i don't know stop them please.from yesterday i have lose sr.8/- from my account.
detail of mass flow meter pricipal
