A piston-cylinder contains nitrogen initially at 100 kPa, 20°C, and a volume of 0.283 m³ (State 1). The nitrogen undergoes two processes. First, the nitrogen is compressed to 7000 kPa (State 2) in an isothermal process. Finally, the nitrogen is expanded to 100 kPa (State 3) in a reversible adiabatic process. You may assume that nitrogen is an ideal gas with constant (average) specific heats: Cp = 1.039 kJ/kgK, c, = 0.742 kJ/kgK, and R = 0.297 kJ/kgK.

A piston-cylinder contains nitrogen initially at 100 kPa, 20°C, and a volume of 0.283 m³ (State 1). The nitrogen undergoes two processes. First, the nitrogen is compressed to 7000 kPa (State 2) in an isothermal process. Finally, the nitrogen is expanded to 100 kPa (State 3) in a reversible adiabatic process. You may assume that nitrogen is an ideal gas with constant (average) specific heats: Cp = 1.039 kJ/kgK, c, = 0.742 kJ/kgK, and R = 0.297 kJ/kgK.

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 piston-cylinder contains nitrogen initially at 100 kPa, 20°C, and a volume of
0.283 m³ (State 1). The nitrogen undergoes two processes. First, the nitrogen
is compressed to 7000 kPa (State 2) in an isothermal process. Finally, the
nitrogen is expanded to 100 kPa (State 3) in a reversible adiabatic process. You
may assume that nitrogen is an ideal gas with constant (average) specific heats:
Cp = 1.039 kJ/kgK, c, = 0.742 kJ/kgK, and R= 0.297 kJ/kgK.

3. What is the work and heat transfer for each process in kJ?

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