A substance has a melting point of 20°C and a boiling point is 150°C. The latent heat of fusion of 3.5 x 104 J/kg and the latent heat of vaporization of 7.0 x 104 J/kg. The specific heat for the solid phases is 600 J/(kg. °C). The specific heat for the liquid phase is 1050 J/(kg.°C) and the specific heat for the gas phase is 400 J/(kg.°C). The specific heat capacity for water is 4190 J/(kg.°C). Water has a melting point of 0°C and a boiling point is 100°C. What mass of water initially at a temperature of 70°C was added to 0.50 kg of the substance, temperature of 16°C, if the final temperature is measured to be 30°C. Assume no heat was lost to the surroundings or the container. Give the mass in kg stated to 3 decimal places. a

A substance has a melting point of 20°C and a boiling point is 150°C. The latent heat of fusion of 3.5 x 104 J/kg and the latent heat of vaporization of 7.0 x 104 J/kg. The specific heat for the solid phases is 600 J/(kg. °C). The specific heat for the liquid phase is 1050 J/(kg.°C) and the specific heat for the gas phase is 400 J/(kg.°C). The specific heat capacity for water is 4190 J/(kg.°C). Water has a melting point of 0°C and a boiling point is 100°C. What mass of water initially at a temperature of 70°C was added to 0.50 kg of the substance, temperature of 16°C, if the final temperature is measured to be 30°C. Assume no heat was lost to the surroundings or the container. Give the mass in kg stated to 3 decimal places. a

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 substance has a melting point of 20°C and a boiling point is 150°C. The latent heat of fusion of 3.5 x 104
J/kg and the latent heat.of vaporization of 7.0 x 10* J/kg. The specific heat for the solid phases is 600 J/(kg.
°C). The specific heat for the liquid phase is 1050 J/(kg.°C) and the specific heat for the gas phase is 400
J/(kg.°C).
The specific heat capacity for water is 4190 J/(kg.°C). Water has a melting point of 0°C and a boiling point is
100°C.
What mass of water initially at a temperature of 70°C was added to 0.50 kg of the substance, at a
temperature of 16°C, if the final temperature is measured to be 30°C.. Assume no heat was lost to the
surroundings or the container.
Give the mass in kg stated to 3 decimal places.

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