Problem 5- Change in entropy for a pure substance A frictionless piston-cylinder assembly contains 0.005 m³ water at 150 kPa and 225°C. Next, the water is cooled at constant pressure until its quality becomes equal to 0.70. Please answer the following. a. Represent the process for the water on a T-s diagram. In your T-s diagram include values for P, T and s. b. Determine the entropy change of the water during this process, in kJ/k using three significant figures. C. Determine the amount of heat removed from the water, in kJ.

Problem 5- Change in entropy for a pure substance A frictionless piston-cylinder assembly contains 0.005 m³ water at 150 kPa and 225°C. Next, the water is cooled at constant pressure until its quality becomes equal to 0.70. Please answer the following. a. Represent the process for the water on a T-s diagram. In your T-s diagram include values for P, T and s. b. Determine the entropy change of the water during this process, in kJ/k using three significant figures. C. Determine the amount of heat removed from the water, in kJ.

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

Problem 5 - Change in entropy for a pure substance
A frictionless piston-cylinder assembly contains 0.005 m³ water at 150 kPa and 225°C. Next, the
water is cooled at constant pressure until its quality becomes equal to 0.70. Please answer the
following.
a. Represent the process for the water on a T-s diagram. In your T-s diagram include values
for P, T and s.
b. Determine the entropy change of the water during this process, in kJ/K using three
significant figures.
c. Determine the amount of heat removed from the water, in kJ.

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Step 1: Determining the given data

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