A 12-ft³ tank contains oxygen at 15 psia and 80°F. A paddle wheel within the tank is rotated until the pressure inside rises to 20 psia. During the process 25 Btu of heat is lost to the surroundings. Determine the paddle wheel work done. Neglect the energy stored in the paddle wheel.

A 12-ft³ tank contains oxygen at 15 psia and 80°F. A paddle wheel within the tank is rotated until the pressure inside rises to 20 psia. During the process 25 Btu of heat is lost to the surroundings. Determine the paddle wheel work done. Neglect the energy stored in the paddle wheel.

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 12-ft³ tank contains oxygen at 15 psia and 80°F. A paddle wheel within the tank is rotated until the
pressure inside rises to 20 psia. During the process 25 Btu of heat is lost to the surroundings. Determine the
paddle wheel work done. Neglect the energy stored in the paddle wheel.

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