Problem 1. Air with 1.6 %mol SO₂ (you can assume very dilute conditions) is scrubbed withsolute-free water in a packed column of 1.5 m² cross-sectional area and 3.5 m in height. The totalgas flow rate is 0.062 kmol/s, the total liquid flow rate is 2.2 kmol/s, and the outlet air has an SO₂mol fraction of 0.004. The equilibrium can be described by y*=40x.a) What is the minimum water flow rate required?b) How does the overall number of gas transfer units (NOG) compare to the number of theoreticalstages required?c) What is the overall height of a gas transfer unit (HOG).

Given data are as follows: Gas flow rate = 0.062 kmol/s liquid flow rate = 2.2 kmol/s mol% of SO2 in…

Answered: Problem 1. Air with 1.6 %mol SO₂ (you…

Introduction to Chemical Engineering Thermodynamics

8th Edition

ISBN:9781259696527

Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Chapter1: Introduction

Section: Chapter Questions

Problem 1.1P

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6. Air at 205 kPa and 37 °C flows upward through a 6-cm diameter inclined duct at a rate of 65 L/s. The duct diameter is then reduced to 4-cm through a reducer. The pressure change across the reducer is measured by a water manometer. The elevation difference between the two points on the pipe where the two arms of the manometer are attached is 0.20 m. Determine the differential height between the fluid levels of the two arms of the manometer. The properties of air at 37 °C is a molar mass of 29 g/mol, viscosity of -1.962*105 kg/m-s, and ep of 1.0063. Assumption: Liquids do
Part_2 The container filled with 5 kg of water is cooled with the water-glycolsolutionwhich flows in a pipe immersed in the container. The initial temperature of water is 5°C and the process is continued till wateris completely frozen and its temperature is equal to -9°C. During the process temperature of water-glycol solution at the inlet and outlet is kept at the -20°C and -18°C, respectively. Heat is transferred from the container to the water-glycol solution and 6 kJ of heat was transferred to water container from the surroundings. Determine (a) the mass of water-glycol solution neededto freeze the water, (b) heat transferred to water-glycol solution and (c)entropy generation. Specific heat of water, ice and water-glycol solution are 4.2 kJ/(kgK), 2.1 kJ/(kgK) and 3.7 kJ/(kgK), respectively. Latent heat of water is 333 kJ/kg. The temperature of surroundings is 10°C.
Q4 liquid water at 294.26,K.flows in a straight horizontal pipe in which there is no exchange of either heat or work with the surroundings. Its velocity is 9.14 m/s in a pipe) with an internal diameter of 2.54 cm until it flows into a section where the pipe diameter abruptly increases. What is the enthalpy change of the water if the downstream 277 diameter is 3.81 cm? 15%
2. A piece of beef steak 7 cm thick will be frozen in the freezer room -40 ° C. This product has a moisture content of 73%, a density of 970 kg / m³, and a thermal conductivity (frozen) of 1.1 W / (m K). freezing time using the Plank equation. This product has an initial freezing temperature of -1.75 ° C, and the movement of air in the freezing room gives a convective heat transfer coefficient of 10 W / (m² K). t f = Answer hour.
Determine the mass of Sodium (Na) produced when a 295 amp current flows for 8 hr through a cell containing molten sodium chloride (NaCl).
1 liquid water at atmospheric pressure, water flows at an average temperature of 37.8 ° C and a speed of 0.058 m/s through a pipe with an inner diameter of 19 mm and a length of 5.8 m. If the pipe wall temperature is 82.8 °C; a) Calculate the heat that will be transferred to the water by convection. b) Calculate the inlet and outlet temperatures of the water into the pipe. c) Test the correctness of the operations performed
30.19 Consider the device shown below that will be used to humidity an air stream. In the current process, air containing 1.0 mol% water vapor (species A) at 40°C and 1.0 atm enters the tube of 3.0 cm inner diameter at a velocity of 300 cm/s. A water- adsorbent material saturated with liquid water lines the inner surface of the tube. Water evaporates from this liner material as over it. There is no diffusion resistance of water vapor air passes Water adsorbent liner (1.0 mm thick, 0.6 g H,O/cm³ liner initially) Gas stream V =300 cm/sec D = 3.0 cm (tube) 1.0 atm, 40°C CA2 L = 8.0 m %3D through the liner material itself. The process is maintained at 40°C. The saturation vapor pressure of water is 55.4 mmHg at 40°C, At this temperature and 1.0 atm, the viscosity of air is 1.91 x 10¬4 g/cm · s and the density of air is 1.13x 10-3 g/cm³. a. What is the Schmidt number for this process? b. Develop a model, in final integrated form, to predict the concentration of water vapor exiting the tube.…
28.21 A 1 x 10-2 m spherical pellet is sprayed with a very thin coat of paint. The paint contains a volatile solvent. To dry the pellet, a 300 K and 1.013 × 105 Pa air stream flows around it with a bulk velocity of 1 m/s. The estimated loading of the solvent in the wet paint is 0.12 g solvent/cm³. Physical properties are vapor pressure of the solvent = 1.27 x 104 Pa mass diffusivity of solvent in air = 9.62 x 10-6 m²/s kinematic viscosity of air density of air = 1.569 x 10-5 m²/s = 1.177 kg/m³ thermal conductivity of air thermal diffusivity of air heat capacity of air = 2.624 x 10-2 J/m.s. K = 2.216 x 10-5 m²/s = 1.006 J/g. K = 78 g/g mole molecular weight of the solvent Use the McAdam's¹¹ equation Nu = 0.37(Redp) 0.6 (Pr) 1/3, where Redp dp vx V to evaluate (a) the heat-transfer coefficient, h; (b) the mass-transfer coefficient, ke; (c) the molar flux of the solvent into the air stream.
QI: The temperature of a gas stream is to be measured by a thermocouple whose junetion can be approximated as a Imm diameter sphere, as shown in Figure below. The properties of the junetion are k 35 w/m. "C. p- 8500 kg/m', and ep- 320 JAkg. "C, and the convection heat transfer coefficient between the junction and the gas is h=210 w/m, "C. Determine how long it will take for the thermocouple to read 99 percent of the initial temperature difference. Thermocouple wire Gas Th Junction Dal mm 1111
0.2 Kg of water saturated liquid is evaporates completely at constant pressure is 100Kpa. By using steam tables Calculate: a. The change in volume during evaporation. b. The quantity of energy add to water during evaporation.
What is the maximum possible efficiency of a heat engine that has a hot reservoir of water boiling under pressure at 125 °C and a cold reservoir at 25 °C? A) 0.25 0.75 0.35 0.80 36 Which of the following is defined as the amount of pressure that must be applied to the solution to stop the influx of the solvent? A osmotic pressure B gauge pressure c) vapor pressure D partial pressure
the pressure drop across the tube bank, and (c) the rate of condensation of steam inside the tubes. Evaluate the air properties at an assumed mean temperature of 35°C and 1 atm. Is this a good assumption?solve this part too

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