A heating device contains 5 kg water and is being heated. During the process, 11 kJ/kg of heat is transferred to the water, and heat losses from the walls amount to 8 kJ. And 5 kl of work is done by the vapor. Determine the change in the energy of the water for this process.

A heating device contains 5 kg water and is being heated. During the process, 11 kJ/kg of heat is transferred to the water, and heat losses from the walls amount to 8 kJ. And 5 kl of work is done by the vapor. Determine the change in the energy of the water for this process.

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 heating device contains 5 kg water and is being heated. During the process, 11 kJ/kg
of heat is transferred to the water, and heat losses from the walls amount to 8 kJ. And
5 kJ of work is done by the vapor. Determine the change in the energy of the water for
this process.

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