An egg with mass 0.0889kg is initially at a uniform temperature of 8°C and is dropped into boiling water at 97°C. The specific heat of the egg is 3.32 kJ/kg.°C. Determine: (a) The amount of heat transfer to the egg by the time the temperature of the egg rises to 70°C. (b) The entropy change of egg in (a). (c) The amount of entropy generation associated with this heat transfer process (to determine entropy generation, we look at extended system that includes the egg and its immediate surroundings). Hint: We worked on similar example 7-21 (liquid-vapor mixture) in class. It will be helpful to study example 7-19 (solid) before starting this problem.

An egg with mass 0.0889kg is initially at a uniform temperature of 8°C and is dropped into boiling water at 97°C. The specific heat of the egg is 3.32 kJ/kg.°C. Determine: (a) The amount of heat transfer to the egg by the time the temperature of the egg rises to 70°C. (b) The entropy change of egg in (a). (c) The amount of entropy generation associated with this heat transfer process (to determine entropy generation, we look at extended system that includes the egg and its immediate surroundings). Hint: We worked on similar example 7-21 (liquid-vapor mixture) in class. It will be helpful to study example 7-19 (solid) before starting this problem.

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

Properties of Pure Substances

A substance with fixed chemical composition throughout is called a pure substance like water, air, and nitrogen. A pure substance does not have to be a single element or compound. A mixture of two or more phases of a pure substance is also a pure substance as long as the chemical composition is the same for all phases. These substances mainly have a constant/ uniform composition. The substances also have fixed boiling and melting points. A pure substance takes part in a chemical reaction to form predictable products.

Question

An egg with mass 0.0889kg is initially at a uniform temperature of 8°C and is dropped into boiling
water at 97°C. The specific heat of the egg is 3.32 kJ/kg.°C. Determine:
(a) The amount of heat transfer to the egg by the time the temperature of the egg rises to 70°C.
(b) The entropy change of egg in (a).
(c) The amount of entropy generation associated with this heat transfer process (to determine
entropy generation, we look at extended system that includes the egg and its immediate
surroundings).
Hint: We worked on similar example 7-21 (liquid-vapor mixture) in class. It will be helpful to study
example 7-19 (solid) before starting this problem.

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Step 1: To find the amount of heat transfer to the egg.

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Step 2: Calculate the entropy change.

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Step 3: Calculate the amount of entropy generation.

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