A thermally isolated system at constant pressure consists of 10 kg of air at a temperature of 1000 K and 10 kg of water at 300 K, connected together by a heat engine. What would be the equilibrium temperature of the system if 1. the heat engine has a thermal efficiency of zero; 2. the heat engine is reversible? [Hint: consider the definition of equilibrium defined by the entropy change of the system.] Assume [432.4 K; 376.7 K] for water: C₁ = 4.2 kJ/kg K; K = Cp/C₁ = 1.0; for air: Cy = 0.7 kJ/kg K; K = Cp/C₁ = 1.4.
A thermally isolated system at constant pressure consists of 10 kg of air at a temperature of 1000 K and 10 kg of water at 300 K, connected together by a heat engine. What would be the equilibrium temperature of the system if 1. the heat engine has a thermal efficiency of zero; 2. the heat engine is reversible? [Hint: consider the definition of equilibrium defined by the entropy change of the system.] Assume [432.4 K; 376.7 K] for water: C₁ = 4.2 kJ/kg K; K = Cp/C₁ = 1.0; for air: Cy = 0.7 kJ/kg K; K = Cp/C₁ = 1.4.
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 thermally isolated system at constant pressure consists of 10 kg of air at a temperature of
1000 K and 10 kg of water at 300 K, connected together by a heat engine. What would be the
equilibrium temperature of the system if
1. the heat engine has a thermal efficiency of zero;
2. the heat engine is reversible?
[Hint: consider the definition of equilibrium defined by the entropy change of the system.]
Assume
[432.4 K; 376.7 K]
for water:
C₁ = 4.2 kJ/kg K;
K = Cp/C₁ = 1.0;
for air:
Cy = 0.7 kJ/kg K;
K = Cp/C₁ = 1.4.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6d71d81e-879d-421f-bb8d-f6105f09838d%2F6b6e8211-7c81-466c-87d4-7f5d3738f8df%2Fdvml1d9_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A thermally isolated system at constant pressure consists of 10 kg of air at a temperature of
1000 K and 10 kg of water at 300 K, connected together by a heat engine. What would be the
equilibrium temperature of the system if
1. the heat engine has a thermal efficiency of zero;
2. the heat engine is reversible?
[Hint: consider the definition of equilibrium defined by the entropy change of the system.]
Assume
[432.4 K; 376.7 K]
for water:
C₁ = 4.2 kJ/kg K;
K = Cp/C₁ = 1.0;
for air:
Cy = 0.7 kJ/kg K;
K = Cp/C₁ = 1.4.
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