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1) Air enters the return air duct in a climate control system operating at steady state with a volumetric flow rate of 60 m3/min at a temperature of 22oC and a pressure of 1.2 bar. Outside air at -13oC is mixed with the return air producing a stream that enters the heating unit of the climate control system. The ratio of the mass flow rate of outside air to return air is 0.15. Assuming no heat transfer in the mixing process, neglecting kinetic and potential energy effects, and assuming ideal gas behavior, determine the temperature of the air entering the heating unit, in oC, and the corresponding mass flow rate, in kg/min.
2) Carbon dioxide (CO2) enters a well-insulated nozzle with negligible velocity at 330 K and 8 bar. The gas exits the nozzle with a velocity of 263.6 m/s at 4.424 bar through an exit area of 7 cm2. Assume the carbon dioxide is an ideal gas with a constant specific heat ratio of k = cp/cv = 1.26 and neglect potential energy effects. For steady state operation, determine the mass flow rate, in kg/s.
Acetylene (C2H2) can be produced from the reaction of calcium carbide (CaC2) with water. Draw the localized electron orbital model (hybridized orbital model) for the acetylide anion (C22-), showing ?, ?, and lone pair electron orbital.
why do firefighters recommend the use of a deluging volume of water when extinguishing an oxidizer-supported fire? what
assuming ideal behavior, calculate the boiling point in C of solution that contains 64.5g or the non-volatile non-electrolyte quinoline( molar mass= 129g/mole) in 500 grams of benzene. For benzene the normal boling point is 80.10 C and Kb = 2.53C/..
The final temperature is 27.06 C. Assume the volumes are additive, the specific heat of the solution is 4.180 J g/C, and that the density of the solution is 1.00 g mL -1. Calculate the enthalpy change, delta H, in kj for the reaction: HBr (aq) +Na..
Show the stereochemistry of the product(s) you would expect when (2S,3S)-2,3-epoxypentane undergoes acid-catalyzed hydrolysis. If more than one cleavage product is possible, draw them all. Use wedge and dash tools to indicate stereochemistry.
Pheromones are compounds secreted by the females of many insect species to attract males. One of these compounds contains 80.78 percent C, 13.56 percent H
Calcium carbonate CaCO3 reacts with stomach acid HCL according to the following equation: CaCO3 + HCl --- CaCl2 + H2O + CO2. Tums, antacid, contains CaCO3. If tums is added to 20.0 mL of 4.00M HCl, How many grams of CO2 gas are produced.
What are the products of a double displacement reaction involving sodium hydroxide and hydrochloric acid
Based on formal charges, which statement about the best Lewis structure of a molecule composed of one atom each of N, S, and Cl is correct
Mercury has the density of 13.6 g/cm3. what is the mass of a cylinder of mercury with a tube with an inside diameter of .45 cm and a height of 76.0 cm
The mass spectrum of an organic compound shows the relative abundances of M to be 34.83% and M 1 to be 6.027%. Assuming the peaks are caused by 12C and 13C isotopes
Does FADH2 have a thermodynamic tendency to reduce coenzyme Q at pH 7. Explain why.
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