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lf pure COz gas at 101.3 kPa is absorbed into a dilute alkaline buffer solution containing acatalyst. The dilute absorbed COz undergoes a first order reaction, k= 35 s-1 and Dae =1.5 x10-em2/s. The solubility of COz is 2.961 *10-7 kgmol/m3.Pa. The surface is exposed to the gas for0.01s. Calculate the concentration remaining unabsorbed by the surface after 0.01 s of exposureto the gas.
Determine the fraction of the incident solar irradiation that is absorbed and what is the emissivity of the disk surface
Calculate the leaf temperature in the rural and urban locations - Obtain an expression for the total, hemispherical absorptivity, aS, of the plate to solar radiation incident at () = 45°. Evaluate aS for a1 = 0.93, a2 = 0.25, and a cut-off waveleng..
a. What is the melting point at standard conditions for ammonia? Boling point is given -33.4C. b. What is the enthalpy change for boiling ammonia at 0C?
The boiling point and latent heat of vaporization of liquid oxygen are 90 K and 213 kJ/kg, respectively. The tank is to be installed in a large compartment whose temperature is to be maintained at 240 K. Design a thermal insulation system that wil..
You are required to determine the decay curves for radioactive decay of a set of heavy isotopes. The isotope, 234U decays into 230Th with a half-life of 246000 years. The isotope, 230Th decays into 226Rn with a half-life of 75380 years. The isotope, ..
a 230-v shunt motor develops a torque of 40 ib-ft when the armature current is 11 a. find the torque developed when the
the melting temperatures for various materials are listed in the inside cover of callister. some representative values
Explain the need for excess air - Determine the actual fuel - Determine the composition of the flue gases by volume
The equilibrium number of vacancies for an element is 3.100 x 10-6 at 600°C and 5.880 x 10-6 at 1300°C. What is the energy of vacancy formation in this element?
a centrifugal compressor delivers 20 kgs of air at 0.32 mnm2 when running at 17500 rpm and absorbing 2800 kw. the inlet
A piston-cylinder device contains 12 kg of saturated R-134a vapor at 3.2 bars. An electric source supplies 8 A current to a resistor within the cylinder for 4 minutes and there is heat transfer of 400 kJ to the system. During these energy interaction..
air flows along a horizontal curve streamline with a curve 20 ft raduis with a speed of 100fts. determine the pressure
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