Q3) A two-phase liquid-vapor mixture of water with an initial quality of 0.25 is contained in a piston cylinder device as shown in the figure below. The mass of the piston is 40 kg, and its diameter is 10 cm. The atmospheric pressure of the surroundings is 1 bar. The initial and final position of the piston are shown in the figure. As the water is heated, the pressure inside the cylinder remains constant until the piston hits the stops. Heat transfer to the water continues until its pressure is 3 bar. Friction between the piston and the cylinder wall is negligible. Determine the total amount of heat transfer, in J. (Gravitational acceleration g= 9.81 m/s2) a) Draw the process in the P-V plot. b) Calculate the heat transfered to the water until the piston hits the stops. c) Calculate the heat required to increase the pressure of the water to 3 bar.

Q3) A two-phase liquid-vapor mixture of water with an initial quality of 0.25 is contained in a piston cylinder device as shown in the figure below. The mass of the piston is 40 kg, and its diameter is 10 cm. The atmospheric pressure of the surroundings is 1 bar. The initial and final position of the piston are shown in the figure. As the water is heated, the pressure inside the cylinder remains constant until the piston hits the stops. Heat transfer to the water continues until its pressure is 3 bar. Friction between the piston and the cylinder wall is negligible. Determine the total amount of heat transfer, in J. (Gravitational acceleration g= 9.81 m/s2) a) Draw the process in the P-V plot. b) Calculate the heat transfered to the water until the piston hits the stops. c) Calculate the heat required to increase the pressure of the water to 3 bar.

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

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Concept explainers

Chemical and Phase Equilibrium

Phase diagrams or equilibrium phase diagrams are the graphical representations that show the phase transformations of the constituting elements with respect to the pressure, temperature, and compositions. The diagrams show the conditions that limit the different phases, namely solid, liquid, and gas. The diagram can also be utilized to verify the relations between the state variables. Most of the phase diagrams are temperature-pressure phase diagrams, with the variable parameter as the composition. Usually other variables such as solubility and pressure parameters are not indicated in the phase diagram. For a one-component system (unary phase diagram), the phase diagram is generally a function of temperature and pressure as the state variables, or temperature and volume. However, for a binary system (two-phase) having two components, the phase diagram is a function of temperature and composition as the state variables only. Coexisting of the different phases of the constituting elements is indicated in the phase diagram. A ternary phase diagram can be characterized by consisting of three phases in equilibrium.

Question

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Q3) A two-phase liquid-vapor mixture of water with an initial quality of 0.25 is contained in a piston
cylinder device as shown in the figure below. The mass of the piston is 40 kg, and its diameter is 10 cm.
The atmospheric pressure of the surroundings is 1 bar. The initial and final position of the piston are
shown in the figure. As the water is heated, the pressure inside the cylinder remains constant until the
piston hits the stops. Heat transfer to the water continues until its pressure is 3 bar. Friction between
the piston and the cylinderwall is negligible. Determine the total amount of heat transfer, in J.
(Gravitational acceleration g= 9.81 m/s2)
a) Draw the process in the P-V plot.
b) Calculate the heat transfered to the water until the piston hits the stops.
c) Calculate the heat required to increase the pressure of the water to 3 bar.

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* Your answer is incorrect. Water contained in a piston-cylinder assembly, initially at 300°F, a quality of 80%, and a volume of 6 ft3, is heated at constant temperature to saturated vapor. If the rate of heat transfer is 0.3 Btu/s, determine the time, in min, for this process of the water to occur. Kinetic and potential energy effects are negligible. At = i 5.217 min
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