A 0.4 kg metal bar initially at 1000 K is removed from an oven and quenched by immersing it in a closed tank containing 10 kg of water initially at 295 K. Each substance can be modeled as incompressible. An appropriate constant specific heat value for water is 4.22 kJ/kg-K and an appropriate value for the metal is 0.42 kJ/kg-K. Heat transfer from the tank structure can be neglected. Determine (a) the final equilibrium temperature of the metal bar and the water in K, and (b) the amount of entropy produced in kJ/K. List any key assumptions.
A 0.4 kg metal bar initially at 1000 K is removed from an oven and quenched by immersing it in a closed tank containing 10 kg of water initially at 295 K. Each substance can be modeled as incompressible. An appropriate constant specific heat value for water is 4.22 kJ/kg-K and an appropriate value for the metal is 0.42 kJ/kg-K. Heat transfer from the tank structure can be neglected. Determine (a) the final equilibrium temperature of the metal bar and the water in K, and (b) the amount of entropy produced in kJ/K. List any key assumptions.
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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A 0.4 kg metal bar initially at 1000 K is removed from an oven and quenched
by immersing it in a closed tank containing 10 kg of water initially at 295 K. Each
substance can be modeled as incompressible. An appropriate constant specific heat value
for water is 4.22 kJ/kg-K and an appropriate value for the metal is 0.42 kJ/kg-K. Heat
transfer from the tank structure can be neglected. Determine (a) the final equilibrium
temperature of the metal bar and the water in K, and (b) the amount of entropy produced
in kJ/K. List any key assumptions. [ Ans. (a) T = 297 K ]
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