1.Manometer fluid = Tungsten Hexafluoride WF6; Density = 13,000 g/m3; MW = 297.83 g/mol You have sent a probe to an unexplored planet and need to figure out what the gravity is on the planet before you can go there. The probe is equipped with a manometer that was calibrated on earth. Pressurized tanks are attached to each side with Tank A being a constant pressure. On earth, the Tank B was set to a pressure of 40 Pa which gave a height difference of 21 cm in the monometer fluid with the tank B side fluid being lower. The manometer was sent to the planet and where tank B pressure was set to 3.7 Pa. This gave a height difference of 6.1 cm with the fluid being higher on the tank B side. What is the gravity constant of the new planet? (Note: density of fluid will not change, and the fluid is immiscible with the other gases)
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Air is contained in a piston-cylinder. Initially, the 0.35 kg of air is at 2 MPa and 350°C. The air is first expanded isothermally to 500 kPa, then compressed polytropically with a polytropic exponent of 1.25 to the initial pressure, and finally compressed at the constant pressure to the initial state. Calculate the net heat transfer during the polytropic process in kJ assuming constant specific heats at 300 K (with 3 significant figures).
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Describe the Diagrammatic Stress Displacement Curve and which strength should be used and when.
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In a device to produce drinking water, humid air at 32C, 90% relative humidity and 1 atm is cooled to 5C at constant pressure. If the duty on the unit is 2,200 kW of heat is removed from the humid air.
Data: Air at 32C has H = 0.204 kJ/mol and at 50C has H = -0.576 kJ/mol
H of steam can be found on the steam tables – vapor at 32C and 1 atm; vapor at 5C and liquid at 5C. Assume the volume of the humid air follows the ideal gas law.
H of water liquid at 5C = 21 kJ/kg; vapor at 5C = 2510.8 kJ/kg; H of water vapor at 32C = 2560.0 kJ/kg
What is the flow of humid air entering the system in mol/min?
What is the flow of humid air entering the system in m^3?
How much drinking water is produced by the system in lit/min?
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1.In combustion of natural gas how is the water influence the reaction(as quantity and quality)? List assumptions and conditions.
2.What happens to concentration of CO as a function of time in combustion of natural gas (as quantity and quality) ? List assumptions and conditions. (Constant Volume, Isothermal, Batch Reactor, Ambient air O2. )
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Glass Transition Temperature and Molecular Motion
List the order of the glass transition temperatures for polyethylene, polypropylene, polyvinyl chloride, and polystyrene. PE (-80), PP (-20), PVC (85), PS (100).
Define the glass transition temperature in polymer materials. –
Describe the reason for this vast range of glass temperatures among these 4 materials.
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In general, condensation polymers have higher monomer feedstock costs but lower capital costs to synthesis. False or True.
Above the critical degree of polymerization, molecular weight largely governs the mechanical properties of the polymer. True or False.
A and B are monomers polymerized to form the following copolymer:
A-A-B-A-B-B-A-A-A-B-A-B-A-A-B-B-B-B. This is an example of a block copolymer. True or False
Engineering Thermoplastics are a class of polymers which are generally more expensive than commodity polymers. True or False.
The processes of crystallization occurs at temperatures below the Tg (glass transition) True or False.
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How does conventional oven cooking different from boiling cooking in respect of conduction, convection, and radiation of heart transfer
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Differentiate Nusselt and Biot number amidst almost the same formula.
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The Henry’s law constant for CO2 dissolved in dichloromethane (DCM) at 25 °C is 153 bar.
a) If the vapor pressure of dichloromethane at this temperature is 56.6 kPa, what is the solubility of CO2 if the total pressure is 1 bar?
b) 100 mole/s of a mixture 17 mole% CO and the rest DCM is fed to a Flash unit operating at 25 °C and 1 bar. Determine the molar flow rates of the exiting vapor and liquid streams and their compositions.
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(ii) Briefly outline methods for BNCT beam production and
their
advantages and disadvantages. Explain advantage of epithermal
neutron BNCT and the method of epithermal neutron beam production
on a reactor .
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What factors inform the choice of the economic or optimum reflux ratio within a distillation column?
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What Happens to the bottom and top products if the feed point to a distillation column is switched from the designed optimum to
1. A tray closer to the reboiler?
2. A tray closer to the condenser?
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rank the top 5 best reactor from best to less best that can deal with high temperture reaction ?
Batch, CSTR, PFR , PBR other ??
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