Please show the complete solution. (Example: Conversion of Units) Steam at 2 MPa and 250°C in a rigid cylinder is cooled until the quality is 30%. Find the heat rejected from the cylinder. At 1.3 MPa, a mixture of steam and water has an entropy of 3 kJ/kg-K, Find the enthalpy of the mixture. @ 1.3MPa: sf = 2.2515 kJ/kg-K sg = 6.4952 kJ/kg-K hf = 814.93 kJ/kg hfg = 1972.7 kJ/kg

Please show the complete solution. (Example: Conversion of Units) Steam at 2 MPa and 250°C in a rigid cylinder is cooled until the quality is 30%. Find the heat rejected from the cylinder. At 1.3 MPa, a mixture of steam and water has an entropy of 3 kJ/kg-K, Find the enthalpy of the mixture. @ 1.3MPa: sf = 2.2515 kJ/kg-K sg = 6.4952 kJ/kg-K hf = 814.93 kJ/kg hfg = 1972.7 kJ/kg

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 653 g/h stream of methyl alcohol, also called methanol, at 6.0atm 10.0C was held at constant pressure, vaporized, and brought to 241.0C. At what rate must heat, be supplied to this system ? Assume that methyl alcohol vapor behaves ideally for the temperature range and pressure given.
Two moles of an ideal gas undergo an irreversible isothermal expansion fromVa=100 liters to Vb=300 liters at T=300K.(a) What is the entropy change for this process?(b) What is the Gibbs free energy change?(c) Is this process spontaneous or not? Explain your answer.
What is the change in entropy when 120 g of superheated methanol gas at 1.00 bar and 110.0 °C is cooled and condensed to liquid methanol at 1.00 bar and 90.5 °C?
Write down the equation for macroscopic entropy change ∆S in a process taking a system between equilibrium states a and b in terms of infinitesimal heat flow and the temperature at which it occurs.
0.03 m3 of nitrogen contained in a cylinder behind apiston is initially at 1.05 bar and 15ºC. The gas iscompressed isothermally and reversibly until the pressureis 4.2 bar. Calculate the change of entropy, the heat flow,and the work done, and sketch the process on a p-v andT-s diagrams. Assume nitrogen to act as a perfect gas.Molecular weight of nitrogen = 28.
An ideal gas with a molecular weight of 42 kg/kg mole is heated at constant pressure from 130oC to 430oC. If the change in enthalpy is 350 kJ/kg, determine: a.The change in internal energy. b.The change in entropy. Thank you!!
At 645.3 kPa and 151.2°C, steam leaves an industrial boiler. When the calorimeter pressure reaches 104.3 kPa, a part of the steam is fed through a throttling calorimeter and expelled to the atmosphere. If the steam temperature at the calorimeter is 113.8°C, a. how much moisture is exiting the boiler container? b. If the mass of the saturated liquid is 15 kg, calculate the mass of the saturated vapor. @ 645.3 kPa and 151.2°C: hf = 624.56 kJ/kg hfg = 2123.3 kJ/kg @ 104.3 kPa and 113.8°C: h2 = 2506.7 kJ/kg
Case 1: 1 kg of water initially at 20 C is heated to 100 C by contact with a heat reservoir at 100 C. Assume Cp for water is constant at 4.2 kJ/ kg *K. What is the entropy change of the water? What is the entropy change of the reservoir? What is ΔSTotal ? Case 2: Now, as an alternative, 1 kg of water at 20 C is first heated to 60 C by contact with a heat reservoir at 60 C, and then this water is heated from 60 C to 100 C by contact with a heat reservoir at 100 C. What is the entropy change of the water? What is the entropy change of the reservoir? What is ΔSTotal ?
Refrigerant 134a (R134a) is at vapor/liquid equilibrium at 300 K. The saturation pressure is 7.0282 bar, the entropy of the saturated liquid is 1.1287 J/(g K) and the entropy of the saturated vapor is 1.7156 J/(g K). If the system has a an entropy of 1.38 J/(g K), what is the quality? (That is, what fraction of the system is vapor?) Report your answer to three decimal places.
A mixture of ideal gases consists of 3 Kg of Ammonia and 5 kg of carbon dioxide at a pressure of 300 Kpa and a temperature of 20 °C. If the mixture is heated at constant volume to 40OC,Find: g. Internal energy h. Enthalpy I. Entropy of the mixture. J. find the change in internal energy, enthalpy, and entropy of the mixture if the heating is done at constant pressure.
One mole of an ideal monatomic gas, initially at a pressure of 1.29 atm and a volumeof 0.0152 m3, , is heated to a final state wherethe pressure is 6.29 atm and the volume is0.0552 m3.The gas constant is 8.31447 J/mol · K .Determine the change in entropy for this
2-An automobile wheel contains air with a pressure of 3x10 'Pa at 25 ° C. The sipop cover was removed and the air was expanded adiabatically against an external pressure of 10 'Pa. What is the final temperature of the gas in the wheel? (It should be taken into account that the gas behaves ideally and the Cp value for air is 7 / 2R)