Determine theoretical oxygen demand (mg/L) for 250 mg/L of methanol (CH3OH). CH30H + 02 → C0, + H,0 Equation is not balanced. ...
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- pls reply asap A closed vessel 5m high contains 2.9m of oil (SG=0.762). A 90mm diameter orifice is situated 0.3m abovi bottom. What pressure must be maintained in the air space in order to discharge 15 hp.he raw water supply for a community contains 160 mg/L total particulate matter. It isto be treated by addition of 86 mg/L alum.Essentially all of the added alum precipitatesby this reaction:Al2(SO4)3 · 14H2O ⇒Al(OH)3(s) + 3SO2−4 + 6H+ + 8H2O. For a total flow of 5500 m3/day, compute the daily alum requirement. Answer in units of kg/day. Determine the concentration of solids in the water following alum addition (i.e., the sum of the solids initially present and those formed during treatment). Answer in units of mg/L.A 10-kg mass of superheated refrigerant-134a at 1.2 MPa and 70°C is cooled at constant pressure until it exists as a compressed liquid at 20°C. (a) Show the process on a T-v diagram with respect to saturation lines. (b) Determine the change in volume. (c) Find the change in total internal energy.
- Calculate the oxygen transfer rate (OTR) in a aeration reactor of volume 10m3 with an air flow rate of QG of 0.1m3/h while the oxygen concentration decreased from 6 g/L to 2.0 g/L.Oil of specific gravity of 0.72 flows through a 7.5 cm diameter orifice withCv = 0.95, Cc = 0.65. What must be the pressure of the air on the surfaceso that the jet’s available power is 6 KW?Provide a reasonable design for a 99,4% efficient ESP treating 30,000 m3/mm of gas, The dust has a resistivity of 7.1(10)10 ohm-cm.
- 2.1 Air having a density of 1.01 kg/m3 and absolute viscosity of 1.79 x 10-4 poise (1.79 x 10-5 Pa-s) flows through a 30.48-cm diameter pipe at the rate of 1814.0 kg/hr. Determine the type of flow existing in the pipe. 2.2 A pipe hose should deliver at least 1 200 lpm. If the nozzle has a diameter of 30 mm, what is the velocity of the issuing jet?A liquid of specific gravity of 1.75 flows in a 6 cm horizontal pipe. The total energy at certain point in the flow is 80 J/N (joules/newton). The elevation of the pipe above the fixed datum is 2.6 m. If the pressure is 75 kPa. Determine the velocity of flow in m/s. A.23.86 b.32.45 c.37.85 d.42.25lA liquid of specific gravity SG = 1.62 flows in a 75 mm diameter horizontal pipe. The total energy at a certain point in the flow is 81 m. The elev. and pressure at this point is 4.7 m., and 63,716 Pa, respectively. Compute the discharge (in m3/s) in the pipe. Round off to three decimal places.
- A closed tank contains liquified butane gas whose specific gravity is 0.60. The tank pressure is 1.7 Mpa gage which is also the equilibrium vapor pressure of butane at the pumping temperature. Suction lines losses is 1.5m of gas and the static elevation gain is 4m. What is the NET POSITIVE SUCTION HEAD AVAILABLE?(NPSHa)4.After the refrigerant from Problem 3 flashes into a vapour, its specific weight is 12.50 N/m3. If the weight flow rate remains at 28.5 N/h, compute the volume flow rate.Air enters an adiabatic nozzle steadily at 300 kPa, 200°C, and 30 m/s and leaves at 100 kPa and 180 m/s. The inlet area of the nozzle is 80 cm2. Determine (a) the mass flow rate through the nozzle, (b) the exit temperature of the air, and (c) the exit area of the nozzle. R = 0.287 kJ/kg. K, CP 1.005KJ/kg. K.