A lump of steel of mass 8 kg at 1000K is dropped in 80 kg of oil at 300K. Make calculations for the entropy change of steel, the oil and the universe. Take specific heats of steel and oil as 0.5 kJ/kg K and 3.5 kkg K, respectively.

A lump of steel of mass 8 kg at 1000K is dropped in 80 kg of oil at 300K. Make calculations for the entropy change of steel, the oil and the universe. Take specific heats of steel and oil as 0.5 kJ/kg K and 3.5 kkg K, respectively.

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

Entropy

In physics, entropy means the amount of disorder or the degree of randomness associated with a thermodynamic system. The system is not self-organized when the entropy of the system is high. For instance, when a system is at an elevated temperature, its molecules are in random motion, vibrating and colliding with each other. During this scenario, the probability of finding a molecule at a particular place twice, is low. Under this circumstance, the system can be said to be in a high entropy.

Question

A lump of steel of mass 8 kg at 1000K is
dropped in 80 kg of oil at 300K. Make
calculations for the entropy change of steel,
the oil and the universe. Take specific heats of
steel and oil as 0.5 kJ/kg K and 3.5 kJkg K,
respectively.

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