Homework Answers
3. Critical temp of ethane = 305 K
Given temp = 100 F = 311 K
Since T>Tc, for liquifaction we necessarily need to reduce temperature as well as increase pressure.
LIQUIFACTION IS NOT POSSIBLE AT THE SAME TEMPERATURE EVEN ON INCREASING PRESSURE
4. Minimum allowable pressure = Vapor pressure at 80 F
Since if the pressure reduces further, propane will vaporize and might cause cavitation or even pipe failure.
Vapor pressure of Propane at 80F = 26.67 C = 300K
From Antoine equation, we have
log10(VP(bar)) = 4.53678 - 1149.36/(T(in K) + 24.906)
Thus, VP = 9.9373 bar
Minimum pressure = 9.9373 bar = 144.13 psi
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3, A tank contains pure ethane at a temperature of 100°F Can the ethane be liquefied...
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Question 1.2: A mixture contains ethane (1), propane (2), isobutane (3) and isopentane (4). If the temperature is maintained constant at 60 °C. Using De-Priester calculate; (a) the bubble point pressure, given xl-0.10, x2 0.20, x3 0.30 (b) the dew point pressure, given y1-0.48, y2-0.25, y3-0.15 13 marks]
Question 1.2: A mixture contains ethane (1), propane (2), isobutane (3) and isopentane (4). If the temperature is maintained constant at 60 °C. Using De-Priester calculate; (a) the bubble point pressure, given...
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A 2.2-m3 rigid tank initially contains air at 100 kPa and 22°C. The tank is connected...
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Part B Review The large tank contains air at an absolute pressure of 64 psi and temperature of 70 F The nozzle has a throat diameter of 1 in. and an exit diameter of 1.75 in. (Figure 1) Determine the absolute pressure within the connected pipe, when the nozzle chokes and maintains isentropic supersonic flow within the divergent section of the nozzle. Express your answer to three significant figures and include the appropriate units P- psi Submit Incorrect; Try Again...
Question 1.2: A mixture contains ethane (1), propane (2), isobutane (3) and isopentane (4). If the temperature is maintained constant at 60 °C. Using De-Priester calculate; (a) the bubble point pressure, given xl-0.10, x2 0.20, x3 0.30 (b) the dew point pressure, given y1-0.48, y2-0.25, y3-0.15 13 marks]
Question 1.2: A mixture contains ethane (1), propane (2), isobutane (3) and isopentane (4). If the temperature is maintained constant at 60 °C. Using De-Priester calculate; (a) the bubble point pressure, given...
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A 2.2-m3 rigid tank initially contains air at 100 kPa and 22°C. The tank is connected to a supply line through a valve. Air is flowing in the supply line at 600 kPa and 22°C. The valve is opened, and air is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. A thermometer placed in the tank indicates that the air temperature at the final state is...
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1.29 A tank contains 500 kg of a liquid whose specific gravity is 2. Determine the volume of the liquid in the tank. 130 Clouds can weigh thousands of pounds due to their liquid water content. Often this content is measured in grams per cubic meter g/m3.Assume that a cumulus cloud occupies a volume of one cubic kilometer,...
(2 pts) A 150 L tank contains 100 L of pure water. Brine that contains 0.1 kg of salt/L enters the tank at 5 L/min. The solution is kept thoroughly mixed and drains from the tank at the rate of 4 L/min. Find the concentration of the salt in the tank at the moment it is full. (2 pts) Separate variables and use partial fractions to solve the following initial value problem. da T = x (- 1), x(0) =...
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The stream "1" consisting of yP1 mole % propane and yEl mole % ethane is blended with the stream "2" containing propane alone and the stream "3"containing nitrogen alone in a mixer in order to produce a gas mixture at Qp inch'/hr. The gas mixture produced with the streams "I". "2", and "3" contains xPP mass % propane, XEP mas % ethane, and XNP mass % nitrogen. The pressure and temperature of the product stream are PtPpsig and TP®F, respectively....
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