PROBLEM #3: Distillation is the process of separating components of a liquid solution from each other by using selective boiling and condensation. A simple distillation setup in a laboratory consists of a distilling flask connected to a condenser. A mixture of ethanol and water is placed in the flask and is then heated using a Bunsen burner up to a temperature of 78°C. The ethanol would then start to vaporize and be separated from the water. Afterwards, the ethanol vapor would pass through a condenser, illustrated below, where cooling water flows through its outer pipes receiving heat from the vapor as the vapor condenses. The ethanol, once it leaves the condenser, is now in liquid form. a. How much heat is transferred from the ethanol to cooling water, in kJ/h? b. If ethanol vapor enters the condenser at 30 kg/h, how much cooling water is needed?

PROBLEM #3: Distillation is the process of separating components of a liquid solution from each other by using selective boiling and condensation. A simple distillation setup in a laboratory consists of a distilling flask connected to a condenser. A mixture of ethanol and water is placed in the flask and is then heated using a Bunsen burner up to a temperature of 78°C. The ethanol would then start to vaporize and be separated from the water. Afterwards, the ethanol vapor would pass through a condenser, illustrated below, where cooling water flows through its outer pipes receiving heat from the vapor as the vapor condenses. The ethanol, once it leaves the condenser, is now in liquid form. a. How much heat is transferred from the ethanol to cooling water, in kJ/h? b. If ethanol vapor enters the condenser at 30 kg/h, how much cooling water is needed?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

A steam/water mixture is contained in a vertical cylinder by a 100 mm diameter freely movable frictionless thin piston. The cylinder is fitted with a set of stops 40 mm above the cylinder base. Initially at State 1, the piston remains in equilibrium 10 mm above the cylinder base while the steam/water mixture is at a pressure of 1.5 bar with a dryness fraction of 0.25. (a) Find the mass of the steam/water mixture. The steam/water mixture is then slowly heated until the piston just reaches the stops at State 2. (b) Using appropriate calculations and reasoning, show that the cylinder contains superheated steam at State 2. The contents of the cylinder are further heated to increase the pressure to 3.0 bar at State 3. (c) Draw the entire heating process on a T-v diagram, indicating all states involved. (d) At State 3, determine the steam temperature and the force exerted by the stops on the piston. (e) Calculate the total work done by the contents in the cylinder from State 1 to State 3.
A dryer is to deliver 1000 kg/hour of palay with a final moisture content of 10%. The initial moisture content in the feed is 15% at atmospheric condition with 32°C dry bulb and 21°C wet bulb. The dryer operates adiabatically while the relative humidity of the hot humid air from the dryer is 80%. If the steam pressure supplied to the heater is 2 MPaa, determine the following, show solution in an orderly manner and select the best answer: 1) amount of palay supplied to the dryer in kg/hour а. 14,192 b. 13,980 c. 13,332 d. 13,679 2) amount of air supplied to the dryer in kg/hour а. 1039 b. 1059 c. 1079 d. 1000 3) temperature of the hot humid air from the dryer а. 29.3 b. 26.3 с. 20.3 d. 23.3
A fruit juices at 30°C with 5% total solids is being concentrated in a single-effect evaporator. The evaporator is being operated at a sufficient vacuum to allow the product moisture to evaporate at 80°C, and steam with 85% quality is being supplied at 169.06 kPa. The desired concentration of the final product is 40% total solids. The concentrated product exits the evaporator at a rate of 2500 kg/h. The specific heat of liquid feed is 4.05 kJ/(kg°C), and of concentrated product is 3.175 kJ/(kg°C). Calculate the:a. Steam requirements is = Answer kg / hour. b. Steam economy for the process, when condensate is released at 90°C. = Answer (kg of water evaporates / kg of steam)
I need the answer as soon as possible
What is the temperature of the mixture if 0.6 kg of alcohol at 60 0C is added to 0,5 kg alcohol at 20 0C in polysterene cup?
PROBLEM 2 In general, the disposal of hot streams to the environment is not a good a practice due to the risk of violating EPA regulations and also, it represents as waste of potential useful energy. For example, raising the temperature of lakes, rivers, and atmosphere have negative consequences on the ecosystems. In this problem, a gas stream at 500°C contains eight percent mole carbon monoxide and the balance carbon dioxide. Before disposing this gas mixture stream into the atmosphere, it makes sense to recover some of its energy first. To achieve this we will use a heat exchanger where the gas stream flows across the tubes. Water flows inside the tubes entering at 25°C and it is fed at a ratio of 0.2 mole water per mole of the hot gas. The water is heating to its boiling point forming saturated steam at five bar. The steam produced can be used for heating or power generation in the facilities or as the feed for another unit operation. You can assume that heat exchanger is thermally…
19. A vessel of 5 m² capacity contains a mixture of two gases in proportion of 40 per cent and 60 per cent at 20°C. If the value of R for the gases is 0.287 kJ/kg K and 0.294 kJ/kg K and if the total weight of the mixture is 1.5 kg, calculate : (i) The partial pressure; (ii) Total pressure; (iii) Mean value of R for the mixture. IAns. 0.1 bar ; 0.155 bar ; 0.291 kJ/kg K]
A 5.00-g sample of aluminum pellets (specific heat capacity = 0.89 J/°C • g) and a 10.00-g sample of iron pellets (specific heat capacity = 45 J/°C • g) are heated to 100.0° The mixture of hot iron and aluminum is then dropped into 97.3 g water at 22.0°C. Calculate the final temperature of the metal and water mixture, assuming no heat loss to the surroundings.
the dryness fraction of a sample of wet steam measured by a combined separating and throttling calorimeter is 0.9. The quality of steam after partial seperation is 0.28 kg of moisture in the separator increases to 0.95. calculate the total mass of the wet steam sample.
Air at 90°C and 1.00 atm (absolute) contains 10.0 mole% water. A continuous stream of this air enters a compressor-condenser, in which the temperature is lowered to 15.6°C and the pressure is raised to 3.00 atm. The air leaving the condenser is then heated isobarically to 100°C. Calculate: (a) the fraction of water that is condensed from the air (b) the relative humidity of the air at 100°C (c) and the ratio of the volumetric flow of the outlet air to the volumetric flow of the feed air.
Steam (80% quality) is used to heat tomato pulp (40% solids content) which flows at a rate of 400 kg / hr through an injection steam heater. The steam is pressurized to 169.06 kPa and flows to the heater at a rate of 45 kg / hr. If the specific heat of the product is 3.2 kJ / (kg K), determine the total solids content of the product after heating and the temperature of the product leaving the heater when the initial temperature is 50 ° C. Assume the specific heat of the product after heating is 3.5 kJ / (kg K) (Use the approach as in Example 3.5 of Singh's book). a. Total solids content of the product = Answer %. b. The temperature of the product that comes out of the heater = Answer ° C.