3 kg of refrigerant R134-a fills a 500-L aluminum-crafted rigid container at an initial pressure of...

 

Transcribed Image Text:

3 kg of refrigerant R134-a fills a 500-L aluminum-crafted rigid container at an initial pressure of 140 kPa. Subsequently, the refrigerant R134-a is then cooled to -30°C. (a) Calculate the specific volume of R134-a at the initial state (state 1) and the final state (state 2). [2 mark) (b) Identify the phase, temperature, enthalpy, and entropy of R134-a at the initial state (state 1). Ensure that all important steps are shown to support the deduction of phase and relevant [6 marks] (c) Identify the phase, pressure, quality, enthalpy, and entropy of R134-a at the final state properties. (state 2). Ensure that all important steps are shown to support the deduction of phase and relevant properties. [6 marks) (d) Calculate the total changes in entropy between state 1 and state 2. [2 marks] (e) Sketch the P –h phase diagram to illustrate the whole process. Label all the relevant info to show your understanding. [4 marks] 3 kg of refrigerant R134-a fills a 500-L aluminum-crafted rigid container at an initial pressure of 140 kPa. Subsequently, the refrigerant R134-a is then cooled to -30°C. (a) Calculate the specific volume of R134-a at the initial state (state 1) and the final state (state 2). [2 mark) (b) Identify the phase, temperature, enthalpy, and entropy of R134-a at the initial state (state 1). Ensure that all important steps are shown to support the deduction of phase and relevant [6 marks] (c) Identify the phase, pressure, quality, enthalpy, and entropy of R134-a at the final state properties. (state 2). Ensure that all important steps are shown to support the deduction of phase and relevant properties. [6 marks) (d) Calculate the total changes in entropy between state 1 and state 2. [2 marks] (e) Sketch the P –h phase diagram to illustrate the whole process. Label all the relevant info to show your understanding. [4 marks]