A mass of 3 kg of saturated liquid-vapor mixture of water is contained in a piston-cylinder device at 160 kPa. Initially, 1 kg of the water is in the liquid phase and the rest is in the vapor phase. Heat is now transferred to the water, and the piston, which is resting on a set of stops, starts moving when the pressure inside reaches 500 kPa. Heat transfer continues until the total volume increases by 20 percent. Determine (a) the initial and final temperatures, (b) the mass of liquid water when the piston first starts moving, and (c) the work done during this process. Also, show the process on a P-v diagram. H₂O m = 3 kg FIGURE P4-120

A mass of 3 kg of saturated liquid-vapor mixture of water is contained in a piston-cylinder device at 160 kPa. Initially, 1 kg of the water is in the liquid phase and the rest is in the vapor phase. Heat is now transferred to the water, and the piston, which is resting on a set of stops, starts moving when the pressure inside reaches 500 kPa. Heat transfer continues until the total volume increases by 20 percent. Determine (a) the initial and final temperatures, (b) the mass of liquid water when the piston first starts moving, and (c) the work done during this process. Also, show the process on a P-v diagram. H₂O m = 3 kg FIGURE P4-120

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

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.

Question

A mass of 3 kg of saturated liquid-vapor mixture of water is contained in a piston-cylinder
device at 160 kPa. Initially, 1 kg of the water is in the liquid phase and the rest is in the vapor
phase. Heat is now transferred to the water, and the piston, which is resting on a set of stops,
starts moving when the pressure inside reaches 500 kPa. Heat transfer continues until the total
volume increases by 20 percent. Determine (a) the initial and final temperatures, (b) the mass
of liquid water when the piston first starts moving, and (c) the work done during this process.
Also, show the process on a P-v diagram.
H₂O
m = 3 kg
FIGURE P4-120

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