A rigid, well-insulated tank contains a two-phase mixture of ammonia with 0.0025 ft3 of saturated liquid and 1.5 ft3 of saturated vapor, initially at p₁ = 70 lb/in2. A paddle wheel stirs the mixture until only saturated vapor at higher pressure, p2, remains in the tank. Kinetic and potential energy effects are negligible. Determine the pressure p2, in lbf/in², and the amount of energy transfer by work, in Btu.

A rigid, well-insulated tank contains a two-phase mixture of ammonia with 0.0025 ft3 of saturated liquid and 1.5 ft3 of saturated vapor, initially at p₁ = 70 lb/in2. A paddle wheel stirs the mixture until only saturated vapor at higher pressure, p2, remains in the tank. Kinetic and potential energy effects are negligible. Determine the pressure p2, in lbf/in², and the amount of energy transfer by work, in Btu.

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.

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A rigid, well-insulated tank contains a two-phase mixture of ammonia with 0.0025 ft3 of saturated
liquid and 1.5 ft3 of saturated vapor, initially at p₁ = 70 lb/in². A paddle wheel stirs the mixture
until only saturated vapor at higher pressure, p2, remains in the tank. Kinetic and potential energy
effects are negligible.
Determine the pressure p2, in lb/in², and the amount of energy transfer by work, in Btu.

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Step 1: Determining the given data

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Step 2: Finding quality & internal energy at state 1

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Step 3: Finding pressure at final state

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Step 4: Finding internal energy at final state

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Step 5: Finding amount of work transfer

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