See Attached 3–54E Superheated water vapor at 180 psia and 500°F isallowed to cool at constant volume until the temperature dropsto 250°F. At the final state, determine (a) the pressure, (b) thequality, and (c) the enthalpy. Also, show the process on a T-Udiagram with respect to saturation lines. Answers: (a) 29.84psia, (b) 0.219, (c) 426.0 Btu/lbm

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Answered: 3–54E Superheated water vapor at 180…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Refrigerant-134a at 400 psia has a specific volume of 0.1384 ft3 /lbm. Determine the temperature of the refrigerant based on (a) the ideal-gas equation, (b) the generalized compressibility chart, and (c) the refrigerant tables.
25 kg of refrigerant 134a, at 300 kPa, fill a rigid container whose volume is 30 L. Determine the temperature and total enthalpy in the container. Now the container is heated, until the pressure is 700 kPa. Determine the temperature and the total enthalpy of the refrigerant when heating is complete.
Q7/ A 1-m3 tank contains 2.841 kg of steam at 0.6 MPa. Determine the temperature of the steam, using (a) the ideal gas equation, (b) the van der Waals equation, and (c) the steam tables.
A 20-ft3 rigid tank initially contains saturated refrigerant- 134a vapor at 160 psia. As a result of heat transfer from the refrigerant, the pressure drops to 50 psia. Show the process on a P-v diagram with respect to saturation lines and determine (a) the final temperature, (b) the amount of refrigerant that has condensed, and (c) the heat transfer.
For the situations below briefly explain how you obtained the values and provide the numerical answer. A) When 1 kg saturated water vapor is condensed to a saturated liquid water at 325 Kpa, what is the change in its volume? B) What is the specific internal energy liquid water at 280 degree Celsius and 7500 Kpa?
A 3.27-m3 tank contains 100 kg of nitrogen at 175 K. Determine the pressure in the tank using (a) the ideal-gas equation, (b) the van der Waals equation, and (c) the BeattieBridgeman equation. Compare your results with the actual value of 1505 kPa.
Steam is contained in a 4-L volume at a pressure of 1.5 MPa and a temperature of 400 C. If the pressure is held constant by expanding the volume while 20 kJ of heat is added, the final temperature is nearest
A rigid vessel of volume 0.02 m3 contains 0.054 kg of steam at an initial pressure of 4 bar. Heat is supplied to the steam from an external source. Calculate (i) the initial quality of the steam, (ii) the temperature and quality of the steam when the pressure becomes 4.5 bar, (iii) the pressure of the steam when it is just dry saturated, and (iv) the temperature when the pressure reaches 7 bar. Indicate the process on a P-V and T-V diagram for water. [Answers: (i) 0.8, (ii) 147.9°C, 0.894, (iii) 5.07 bar, (iv) 298.4°C]
Reconsider Prob Solve the problem using appropriate software. Compare the temperature of water for the three cases at constant specific volume over the pressure range of 0.1 MPa to 1 MPa in 0.1-MPa increments. Plot the percent error involved in the ideal-gas approximation against pressure, and discuss the results.
One pound mass of a steam-water mixture at 160 psia is contained in an inflexible tank. Heat is added until the pressure rises to 600 psia and the temperature to 600°F. Determine the heat added.
1.)What is the condition of the liquid at 212 F and 14.696 psia is : 2.) The vapor at 212 F and 14.696 psia ,in the absence of any liquid whatsoever ,what is its condition?
27.259 kg per second of water at 0.03398675 kbarg and internal energy of 15000 kW is heated at constant pressure to saturated vapor and further heated at constant volume process until the pressure is quadrupled. Determine the ratio of the heat added during the constant volume process to the heat added during the constant pressure process. Use steam tables of Keenan et al.

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