2.A rigid tank of volume 0.5 m³ is connected to a piston-cylinder assembly by a valve as shown below. Both vessels contain pure water. They are immersed in a constant temperature bath at 200 °C and 600 kPa. Consider the tank and the piston cylinder assembly as the system and the constant temperature bath as the surroundings. Initially the valve is closed and both units are in equilibrium with the surroundings (the bath). The rigid tank contains saturated water with a quality of 95% (i.e., 95% of the mass of water is vapor). The piston cylinder assembly initially has a volume of 0.1 m³. The valve is then opened. The water flows into the piston-cylinder until equilibrium is obtained. For this process, calculate the change in entropy for the system, the surroundings and the universe. Surroundings Pure H₂O V=0.5 m³ Quality = 95% Temperature bath TB = 200°C P=600 kPa H₂O Vinitial = 0.1 m³
2.A rigid tank of volume 0.5 m³ is connected to a piston-cylinder assembly by a valve as shown below. Both vessels contain pure water. They are immersed in a constant temperature bath at 200 °C and 600 kPa. Consider the tank and the piston cylinder assembly as the system and the constant temperature bath as the surroundings. Initially the valve is closed and both units are in equilibrium with the surroundings (the bath). The rigid tank contains saturated water with a quality of 95% (i.e., 95% of the mass of water is vapor). The piston cylinder assembly initially has a volume of 0.1 m³. The valve is then opened. The water flows into the piston-cylinder until equilibrium is obtained. For this process, calculate the change in entropy for the system, the surroundings and the universe. Surroundings Pure H₂O V=0.5 m³ Quality = 95% Temperature bath TB = 200°C P=600 kPa H₂O Vinitial = 0.1 m³
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:**Problem Statement:**
A rigid tank of volume 0.5 m³ is connected to a piston-cylinder assembly by a valve as shown in the diagram below. Both vessels contain pure water and are immersed in a constant temperature bath at 200 °C and 600 kPa. Consider the tank and the piston-cylinder assembly as the system, and the constant temperature bath as the surroundings.
Initially, the valve is closed, and both units are in equilibrium with the surroundings (the bath). The rigid tank contains saturated water with a quality of 95% (i.e., 95% of the mass of water is vapor). The piston-cylinder assembly initially has a volume of 0.1 m³. The valve is then opened, and the water flows into the piston-cylinder until equilibrium is reached.
For this process, calculate the change in entropy for the system, the surroundings, and the universe.
**Diagram Description:**
The diagram depicts a closed system where the rigid tank is labeled "Surroundings" with:
- Pure H₂O
- Volume (V) = 0.5 m³
- Quality = 95%
This is connected via a valve to the piston-cylinder assembly, which has:
- Initial volume (V_initial) = 0.1 m³
Both are immersed in the temperature bath with:
- Temperature (T_B) = 200°C
- Pressure (P) = 600 kPa
The diagram effectively illustrates the setup and the initial conditions for solving the problem on the change in entropy.
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