Lead nitrate has a water solubility of 56.5 g/cm3 at 20 °C. What lead concentration is this in molar? What nitrate concentration is this in molar?
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A fuel gas containing 75.0 mole% methane and the balance ethane
is burned completely with 15.0 % excess air.
The stack gas leaves the furnace at 800.0 °C and is cooled to 450.0
°C in a waste-heat boiler, a heat exchanger in
which heat lost by cooling gases is used to produce steam from
liquid water for heating, power generation, or process
applications.
Taking as a basis of calculation 100.0 mol of the fuel gas fed to the furnace, calculate the amount (magnitude) of heat (MJ) that must be transferred from the gas in the waste heat boiler to accomplish the indicated cooling. Provide your answer to 3 significant figures.
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A stream of water vapor flowing at a rate of 452 mol/h is brought from 700.0 °C and 10 bar to 400.0 °C and 1 atm. Using Steam Tables, Estimate the required cooling rate (in kW). Use five significant figures in your calculations.
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A fuel gas containing
75.0 mole% methane and the balance ethane is burned completely with
15.0 % excess air.
The stack gas leaves the furnace at 800.0 °C and is cooled to 450.0
°C in a waste-heat boiler, a heat exchanger in
which heat lost by cooling gases is used to produce steam from
liquid water for heating, power generation, or process
applications.
Taking as a basis of calculation 100.0 mol of the fuel gas fed to the furnace, calculate the amount (magnitude) of heat (MJ) that must be transferred from the gas in the waste heat boiler to accomplish the indicated cooling. Provide your answer to 3 significant figures.
In: Other
Discuss in general the professional integrity and ethical decision making relevant to engineering practices involving
1. liquid-liquid separation process
2. solid-liquid separation process
Perform a case study for each process and further elaborate the impact of the professional integrity and ethical decision making relevant to engineering practices on the public and society supported by real examples.
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A 30.75kg of coal contains 24% phosphorus, 28%
pyrites,0.01% Nitrogen, 8% Oxygen and moisture as basic impurities.
It is desired that this Coal will be used in the metallurgical
industry, production of electricity through combustion and
synthesis of ammonium compounds for fertilizer production.
(a) Explain the analytical method used in estimating the percentage
amount of impurities?
(b) Is this coal sample suitable for the purposes stated
above?
(c)Explain the coal cleaning scheme unit operations.
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The mechanism of momentum transfer in liquids involves the continual action of intermolecular forces rather than the free flight mechanism in gases. Qualitatively explain the different behavior of η with T on this basis.
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c. With a neat diagram show various components of a separator. Explain briefly their functions and utility
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The dew-point temperature of a gas mixture with a molar composition of 40.0% n-hexane, 25.0% n-heptane, and 35.0% air at 1.00 atm.
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In a fuel injection system small droplets are formed as the liquid jet breaks up. Assume the droplet diameter, d, is a function of the liquid density, ρ, viscosity, µ, surface tension, ϒ, the jet velocity, V, and the jet diameter D. Derive this relationship in dimensionless form.
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with reference to oil and gas production expain Hindrance to Oil and Gas Flow in Pipelines
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Chlorine is produced from hydrogen chloride and oxygen via the following reaction at 700K and 1bar:
4HCl(g) +02(g) --> 2H2O(g)+2Cl2(g)
The data for the standard for the standard Gibbs free energy and the standard heat of formation for each species in the rxn at 298.15K are given in table below.
| Standard Gibbs Free Energy (j/mol) | Standard Heat of Formation (J/mol) | |
|---|---|---|
| HCl(g) | -95299 | -92307 |
| H2O(g) | -228572 | -241818 |
a)Estimate the equilibrium production rate (kmol/s) for chlorine if the initial flow rate for hydrogen chloride and oxygen are 20kmol/s and 40kmol/s, respectively.Assume ideal gas condition is valid.(14m)
b)Based on part (a), propose the new equlibrium temperature if the production rate for chlorine is 6kmol/s, assuming ideal gas condition with the reaction pressure of 2bar.(5M)
c) An engineer has proposed to add 5kmol/s of chlorine into the reactor together with hydrogen chloride and oxygenduring the reaction to increase the chlorine production on part (a).Justify the feasibility of this proposal with calculation and explanation.(6m)
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(Problem 4.3-3) Water at 298 K discharges from a nozzle and travels horizontally, hitting a flat, vertical wall. The nozzle has a diameter of 12 mm and the water leaves the nozzle with a flat velocity profile at a velocity of 6.0 m/s. Neglecting frictional resistance of the air on the jet, calculate the force in newtons on the wall.
Ans. –Rx = 4.059 N
Repeat Problem 4.3-3 for the same conditions except that the wall is inclined 45° to the vertical. The flow is frictionless. Assume no loss in energy. The amount of fluid splitting in each direction along the plate can be determined by using the continuity equation and a momentum balance. Calculate this flow division and the force on the wall.
Ans. m2 = 0.5774 kg/s, m3 = 0.09907 kg/s, –Rx = 2.030 N, –Ry = –2.030 N (force on wall).
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The lower flammability limit (LFL) and upper flammability limit (UFL) are important safety limits which describe the minimum and maximum volume fraction in air, respectively, that a flammable substance can burn if ignited. If the range of concentration of benzene in air in which ignition could take place is 1.4 - 8.0 vol%, what would be the corresponding temperatures for air saturated with benzene in the vapour space of a storage tank assuming a total pressure in the vapour space of 100 kPa?
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What is the crystal structure with the least atomic packing factor in metal?
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