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A rigid tank filled with R-134a is divided into two chambers by a membrane. The membrane is a perfect insulator and there is no heat transfer between the chambers. The volume of the R-134a in chamber A and chamber B is VA = 2 m² and Vg = 15 m², respectively. Initially (state 1), chamber A contains R-134a at a temperature of 90 °C and a pressure of 550 kPa. Chamber A also contains a plate of nickel with a mass of mw = 30 kg that is always in thermal equilibrium with the refrigerant. Chamber B contains 55 kg of R- 134a at a temperature of -35 °C. The membrane ruptures and heat transfers between the tank and its surroundings such that the R-134a inside the tank reaches a uniform state, with a final temperature, T2, of -26.3°C. The specific heat of nickel is Cni = 0.44 kJ/kgK a) Determine the mass and the specific internal energy of| the R-134a in chamber A at the initial state. (ie. m, and un) b) Determine the pressure and specific internal energy of the R-134a in chamber Bat the initial state. (ie. Pa and un) c) Determine the pressure and specific internal energy of the R-134a at the final state. (ie. P, and u;)

A rigid tank filled with R-134a is divided into two chambers by a membrane. The membrane is a perfect insulator and there is no heat transfer between the chambers. The volume of the R-134a in chamber A and chamber B is VA = 2 m² and Vg = 15 m², respectively. Initially (state 1), chamber A contains R-134a at a temperature of 90 °C and a pressure of 550 kPa. Chamber A also contains a plate of nickel with a mass of mw = 30 kg that is always in thermal equilibrium with the refrigerant. Chamber B contains 55 kg of R- 134a at a temperature of -35 °C. The membrane ruptures and heat transfers between the tank and its surroundings such that the R-134a inside the tank reaches a uniform state, with a final temperature, T2, of -26.3°C. The specific heat of nickel is Cni = 0.44 kJ/kgK a) Determine the mass and the specific internal energy of| the R-134a in chamber A at the initial state. (ie. m, and un) b) Determine the pressure and specific internal energy of the R-134a in chamber Bat the initial state. (ie. Pa and un) c) Determine the pressure and specific internal energy of the R-134a at the final state. (ie. P, and u;)

Elements Of Electromagnetics
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 rigid tank filled with R-134a is divided into two chambers by a membrane. The membrane is a perfect insulator and there is no heat transfer between the chambers. The volume of the R-134a in chamber A and chamber B is VA = 2 m³ and V8 = 15 m?, respectively. Initially (state 1), chamber A contains R-134a at a temperature of 90 °C and a pressure of 550 kPa. Chamber A also contains a plate of nickel with a mass of mNi = 30 kg that is always in thermal equilibrium with the refrigerant. Chamber B contains 55 kg of R- 134a at a temperature of -35 °C. The membrane ruptures and heat transfers between the tank and its surroundings such that the R-134a inside the tank reaches a uniform state, with a final temperature, T2, of -26.3°C. The specific heat of nickel is CaNi = 0.44 kJ/kgK a) Determine the mass and the specific internal energy of the R-134a in chamber A at the initial state. (ie. m, and ua) b) Determine the pressure and specific internal energy of the R-134a in chamber B at the initial state. (ie. Pa and us) c) Determine the pressure and specific internal energy of the R-134a at the final state. (ie. P, and uz) d) Determine total heat transfer (between the tank and its surroundings) during the process. (ie. ,Q.) А В (R-134a) (R-134a) Membrane Nickel Plate
Transcribed Image Text:A rigid tank filled with R-134a is divided into two chambers by a membrane. The membrane is a perfect insulator and there is no heat transfer between the chambers. The volume of the R-134a in chamber A and chamber B is VA = 2 m³ and V8 = 15 m?, respectively. Initially (state 1), chamber A contains R-134a at a temperature of 90 °C and a pressure of 550 kPa. Chamber A also contains a plate of nickel with a mass of mNi = 30 kg that is always in thermal equilibrium with the refrigerant. Chamber B contains 55 kg of R- 134a at a temperature of -35 °C. The membrane ruptures and heat transfers between the tank and its surroundings such that the R-134a inside the tank reaches a uniform state, with a final temperature, T2, of -26.3°C. The specific heat of nickel is CaNi = 0.44 kJ/kgK a) Determine the mass and the specific internal energy of the R-134a in chamber A at the initial state. (ie. m, and ua) b) Determine the pressure and specific internal energy of the R-134a in chamber B at the initial state. (ie. Pa and us) c) Determine the pressure and specific internal energy of the R-134a at the final state. (ie. P, and uz) d) Determine total heat transfer (between the tank and its surroundings) during the process. (ie. ,Q.) А В (R-134a) (R-134a) Membrane Nickel Plate
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