Q4. A piston-cylinder device initially contains 0.5 m3 of 1.1-kg saturated liquid water and steam mixture at 100 kPa. An electric heater within the device is turned on and is allowed to pass a current of 2.0 A from a 120-V source. There's no other form of energy transfer besides the electrical work and boundary work. The piston initially rests on a set of stops, and a pressure of 200 kPa is required to move the piston. Afterwards, the system continues to raise the piston and eventually reaches a temperature of 400°C. For this problem you must use the property tables from the textbook. Determine the time it takes (in hours) for the system to just move the piston. Please pay attention: the numbers may change since they are randomized. Your answer must include 3 places after the decimal point.

Q4. A piston-cylinder device initially contains 0.5 m3 of 1.1-kg saturated liquid water and steam mixture at 100 kPa. An electric heater within the device is turned on and is allowed to pass a current of 2.0 A from a 120-V source. There's no other form of energy transfer besides the electrical work and boundary work. The piston initially rests on a set of stops, and a pressure of 200 kPa is required to move the piston. Afterwards, the system continues to raise the piston and eventually reaches a temperature of 400°C. For this problem you must use the property tables from the textbook. Determine the time it takes (in hours) for the system to just move the piston. Please pay attention: the numbers may change since they are randomized. Your answer must include 3 places after the decimal point.

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

If 6 liters of air at a pressure of 100 kPaa and 25 0 C are compressed reversiblyaccording to PV 2 = C, until the volume becomes 2 liters. determine : a. The thermodynamic process the problem representsb. the pressure, temperature, and volume after the processc. change in internal energy, change in enthalpy and change in entropyd. work nonflow and heat transferred
1.A gas is undergoing an isothermal process the pressure ratioof the final to the initial state is 2.5 and the cylinder it is stored in is initially2ft3. Find the lengthof stroke(in)if the area of the cylinder is 30in2 2.A cylinder compresses gas isothermally and it 3.Adiesel engine powers a boat. Theengine’s cylinderseachhavea compression ratio(Vmax/Vmin)of 12 and the Vmax is 4ft3.If 1 cylinderis in the isobaric compression stroke,find the final temperature if the initial temperature is 540F 4.A cylinder is heated to cause a piston to move upwards using the expansion of gas inside it. If pressure remains constant, and the initial and final temperatures are 500R and 700R respectively, how much willthe piston move up(in)if the initial volume is 1ft3, and the area of cylinder is 60in2?Neglect the weight of the piston. 5.Agas tank is accidentallyplaced near a heat source. Its bourdon pressure gaugereading was initially 30kpag but after some time the reading became 50kpag. Find the final…
Q6. A 500 W heater is used to melt 5 kg of solid ice at -30°C to gas at +130°C at a constant pressure of 100 kPa. (a) Show the process on the p-T-v, p-v and T-v diagrams (b) Find the change in the total volume of the water (c) Find the energy the heater must provide to the water (d) Find the time the process will take assuming uniform T in the water
R-134a refrigerant in a piston-cylinder assembly 0.1 m3 240 kPa and 40 ° C by volume are available. The piston held fixed by the pin and the masses on it and atmospheric The pressure created by the pressure is 280 kPa. Pressure in the cylinder to 280 kPa it is heated in constant volume until it is raised. And then cooling by pulling the pin With the process, heat is removed with a slow process. If the temperature reached after this process is 50 ° C Find the interactions of heat and work during these two processes.
Complete Solutions
(Q4) Two rigid tanks are connected by a valve. Tank A contains 0.2 m' of water at 400 kPa and 3 H,0 H,0 80 percent quality. Tank B contains 0.5 m of water at 200 kPa and 250°C. The valve is now 400kPa 200 kPa opened, and the two tanks eventually come to the o. same state. Determine the pressure and the amount of heat transfer when the system reaches thermal equilibrium with the surroundings at 25°C. B
In previous solution someone took value of u1 and u2 ,does it required? It's constant Temperature process.
Example A 5-hp fan is used in a large room to provide for air circulation. Assuming a well-insulated, sealed room determine the internal energy increase after 1h of operation.
I am getting lost in this practice problem for thermodynamics - thank you! Air at 100 kPa and 280K is compressed steadily to 600 kPa and 400K in an air compressor. The mass flow rate of air through the compressor is 0.02 kg/s and the compressor a heat loss of 16 kJ/kg from the compressor occurs. Assuming steady state steady flow conditions and ideal gas behavior (with constant specific heats, Cp=1.009 kJ/kgK, R=0.287 kJ/kgK, determine: a) The necessary power in put to the compressor(kW).b) The volumetric flow rate of air at the exit of the compressor (m3/s).
B5
I need help with this thermo practove problem that I do not understand- thank you! 2 kg of air in a piston cylinder initially at P1=101 kPa, T1= 300 K undergoes a cyclemade up of three processes: 1-2 Isothermal compression until the volume is (1/15) of its original value.2-3 Constant Pressure heating3-1 Isentropic Expansion back to the initial state Assume air is an ideal gas with constant specific heats with the following values: Cpo=1.027kJ/kgK; Cvo= 0.740 kJ/kgK; R=0.287 kJ/kgK; ɣ=1.388 Fill out the processes table below. Calculate Processes 1-2, 2-3, and 3-1 clearly
Steam with an enthalpy of 2843.5 kJ/kg undergoes a constant pressure process at 0.9 MPauntil the enthalpy becomes 2056.1 kJ/kg. What are: a. The initial temperature or quality of steamb. The work of the process.