2- Water in the bottom of a narrow metal tube is held at a constant temperature...
I need you to show the table Example 2 : Diffusion of Water Through Stagnant, Nondiffusing Air Water in the bottom of a narrow metal tube is held at a constant temperature of 20°C. The total pressure of air (assumed dry) is 1.0 atm and the temperature is 20°C. Water evaporates and diffuses through the air in the tube, and the diffusion path 22-Z is 0.5 ft long. Calculate the rate of evaporation at steady state in lb mol/hr.ft. The...
6.83 A disk of 20-mm diameter is covered with a water film. Under steady-state conditions, a heater power of 200 mW is required to maintain the disk-water ilm at 305 K in dry air at 295 K and the observed evaporation rate is 2.55 × 10-4 kg/h. Air T 295 K Water film, T 305 K Disk, D = 20 mm Heater, 200 m (a) Calculate the average mass transfer convection (b) Calculate the average heat transfer convection (c) Do...
Exercise 2 Moist air at 1 atm. barometric pressure has a dry bulb temperature of 40°C and a wet bulb temperature of 320C. Using both the equations for the moist air properties and the psychrometric chart find: g) the partial pressure of the water vapor h) humidity ratio i) relative humidity j) dew-point temperature k) specific volume 1) enthalpy of moist air Insert the data and the results from the chart in the following table: Enthalpy Specific kJ/kg m/kg Humidity...
On a summer day, the air temperature is 36°C and the relative humidity is 20%. Water evaporates from the surface of a lake at a rate of 0.20 kg/h per square metre of water surface area. The temperature of water is 25°C. (a) Determine the mass transfer coefficient. (10 marks) (b) Determine the convective heat transfer coefficient. (10 marks) (c) Determine the net heat loss (in W/m2) from the lake. (5 marks) The specific volume of water vapour at 25°C...
plastic 5. Consider the diffusion of water vapor through a polypropylene (PP) sheet 2 mm thick T pressures of H20 at the two faces are 1 kPa and 9 kPa, which are maintained constant. Th permeability coefficient of H2O through PP is 38 x 103 (cm STP)-cm/cm2-s-Pa. Assumin conditions of steady state, what is the diffusion flux, in [(em STP/em-s), at 298 K? Answer:ー-52,10ーフ (cm3 STP)/cm2-S 1.52 10 5. Consider the diffusion of water vapor through a polypropylene (PP) sheet...
Answer all parts complete to get 100% feedback!!! Problem 2 (30 Points A cylindrical container filled with liquid 225 kPa stored in a large room. The diameter of the the lido 25 kPa is initially aniline-free and the room temperature container is 45 cm. The ambient air is id of the container is removed and the aniline evaporates slowly. a ndfiusion coefficient of aniline in air. Use the empirical equation aniline diffusion has not reached steady state at 15 cm...
answer questions #1-7 and I'll send more information on question #7. We were unable to transcribe this imagesolution of a Mixture by Distillation 4 BACKGROUND s one of the most common methods of purifyinga ery simple method: a liquid is brought to a boil, the liquid becomes a gas the gas a liquid. It is a collected returns to the liquid state and the liquid acquire sufficient e from the liquid phase and enter into the s vapor phase Evaporation...
Can someone explain me ..how they got the 29.o kg bda pls 254 Chapter 6 Multiphane Sysicoms Percentage Saturation (Percentage Humidity) -n) × 100% ที่ (P-pp at a given temperature and pressure, you fraction of the vapor solve the defining equation to cakulate the partial peessure or mo ia the gas; thercafter, degrees of superheat. quantities for a gas If you are given amy of these q to given previously to calculate the dew point and you can use the...
summatize the following info and break them into differeng key points. write them in yojr own words apartus 6.1 Introduction—The design of a successful hot box appa- ratus is influenced by many factors. Before beginning the design of an apparatus meeting this standard, the designer shall review the discussion on the limitations and accuracy, Section 13, discussions of the energy flows in a hot box, Annex A2, the metering box wall loss flow, Annex A3, and flanking loss, Annex...