answer 59,60 Thermodynamic KeysProperty RelationsQuestions 56-60 are based on the information given here. Air, as an ideal gas,undergoes a reversible process in a piston-cylinder assembly from Pi-100 kPa andT1= 300K to P: 5.4 MPa and T2=900K. [cp 1.005 kJ/kg-K, c, 0.718 kJ/kg-K]56. The change in the internal energy of the gas in kJ/kg isa.172.2b.430.8с.603.0d.cannot be determined.57. The change in the enthalpy of the gas in kJ/kg isa.172.2b.430.8603.0cannot be determined.с.d.58. The change in entropy for the gas in kJ/kg•K isa.+2.246b.-2.246-0.0407+0.0407с.d.59. The specific heat ratio k for the gas isa.0.287b.0.7181.005d.1.400с.60. The gas constant R for the gas in kJ/kg•K is0.2870.718a.b.1.0051.400с.d.

Answered: Image /qna-images/answer/378bccdb-3d18-4551-b8a2-f727469d1482.jpg

Questions 56-60 are based on the information given here. Air, as an ideal gas, undergoes a reversible process in a piston-cylinder assembly from Pi-100 kPa and T= 300K to P: 5.4 MPa and T: 900K. [cp 1.005 kJ/kg-K, c,- 0.718 kJ/kg-K) 56. The change in the internal energy of the gas in kJ/kg is a. 172.2 430.8 b. 603.0 с. cannot be determined. 57. The change in the enthalpy of the gas in kJ/kg is d. a. 172.2 b. 430.8 C. 603.0 d. cannot be determined. 58. The change in entropy for the gas in kJ/kg•K is a. +2.246 b. -2.246 -0.0407 с. d. +0.0407 59. The specific heat ratio k for the gas is a. 0.287 0.718 b. 1.005 d. 1.400 60. The gas constant R for the gas in kJ/kg•K is с. a. 0.287 b. 0.718 1.005 C. d. 1.400

Questions 56-60 are based on the information given here. Air, as an ideal gas, undergoes a reversible process in a piston-cylinder assembly from Pi-100 kPa and T= 300K to P: 5.4 MPa and T: 900K. [cp 1.005 kJ/kg-K, c,- 0.718 kJ/kg-K) 56. The change in the internal energy of the gas in kJ/kg is a. 172.2 430.8 b. 603.0 с. cannot be determined. 57. The change in the enthalpy of the gas in kJ/kg is d. a. 172.2 b. 430.8 C. 603.0 d. cannot be determined. 58. The change in entropy for the gas in kJ/kg•K is a. +2.246 b. -2.246 -0.0407 с. d. +0.0407 59. The specific heat ratio k for the gas is a. 0.287 0.718 b. 1.005 d. 1.400 60. The gas constant R for the gas in kJ/kg•K is с. a. 0.287 b. 0.718 1.005 C. d. 1.400

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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1. Where necessary, assume air as an ideal gas and consider R = 287 J/(kg.K), Cp = 1005 J/(kg.K), Cv = 718 J/(kg.K). a) A nozzle is a device that is used to increase the velocity of a fluid by varying the cross-sectional area. At the last section of a jet engine (Fig Q1.a, section 5), air with a mass flow rate of 50 kg/s at a pressure of 500 kPa and a temperature of 600 K enters a nozzle with an inlet cross-sectional area of 5 m2. The exit area of the nozzle is 20% of its inlet area. The air leaves the nozzle at a velocity of 300 m/s. The nozzle is not well-insulated and during this process, 5 kJ/kg heat is lost.Figure Q1.a: Schematic of a Jet engine.(iv) Determine the temperature of the air as it leaves the nozzle.
1. Where necessary, assume air as an ideal gas and consider R = 287 J/(kg.K), Cp = 1005 J/(kg.K), Cv = 718 J/(kg.K). a) A nozzle is a device that is used to increase the velocity of a fluid by varying the cross-sectional area. At the last section of a jet engine (Fig Q1.a, section 5), air with a mass flow rate of 50 kg/s at a pressure of 500 kPa and a temperature of 600 K enters a nozzle with an inlet cross-sectional area of 5 m2. The exit area of the nozzle is 20% of its inlet area. The air leaves the nozzle at a velocity of 300 m/s. The nozzle is not well-insulated and during this process, 5 kJ/kg heat is lost.Figure Q1.a: Schematic of a Jet engine.(v) Calculate the pressure of the air as it leaves the nozzle.
Where necessary, assume air as an ideal gas and consider R = 287 J/(kg.K), Cp = 1005 J/(kg.K), Cv = 718 J/(kg.K). a) A nozzle is a device that is used to increase the velocity of a fluid by varying the cross-sectional area. At the last section of a jet engine (Fig Q1.a, section 5), air with a mass flow rate of 50 kg/s at a pressure of 500 kPa and a temperature of 600 K enters a nozzle with an inlet cross-sectional area of 5 m2. The exit area of the nozzle is 20% of its inlet area. The air leaves the nozzle at a velocity of 300 m/s. The nozzle is not well-insulated and during this process, 5 kJ/kg heat is lost.Figure Q1.a: Schematic of a Jet engine.(iii) Calculate the density of the air as it leaves the nozzle.
Where necessary, assume air as an ideal gas and consider R = 287 J/(kg.K), Cp = 1005 J/(kg.K), Cv = 718 J/(kg.K). a) A nozzle is a device that is used to increase the velocity of a fluid by varying the cross-sectional area. At the last section of a jet engine (Fig Q1.a, section 5), air with a mass flow rate of 50 kg/s at a pressure of 500 kPa and a temperature of 600 K enters a nozzle with an inlet cross-sectional area of 5 m2. The exit area of the nozzle is 20% of its inlet area. The air leaves the nozzle at a velocity of 300 m/s. The nozzle is not well-insulated and during this process, 5 kJ/kg heat is lost. Figure Q1.a: Schematic of a Jet engine.(ii) Determine the density and velocity of the air entering thenozzle.
Where necessary, assume air as an ideal gas and consider R = 287 J/(kg.K), Cp = 1005 J/(kg.K), Cv = 718 J/(kg.K). a) A nozzle is a device that is used to increase the velocity of a fluid by varying the cross-sectional area. At the last section of a jet engine (Fig Q1.a, section 5), air with a mass flow rate of 50 kg/s at a pressure of 500 kPa and a temperature of 600 K enters a nozzle with an inlet cross-sectional area of 5 m2. The exit area of the nozzle is 20% of its inlet area. The air leaves the nozzle at a velocity of 300 m/s. The nozzle is not well-insulated and during this process, 5 kJ/kg heat is lost.Figure Q1.a: Schematic of a Jet engine. (i) In analysing this nozzle using the 1st law of thermodynamics, the change in which type of energy is negligible?
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Handwritten solution required for this Thermodynamics question
Example 1 An gas whose pressure, volume and temperature are 275 KN/m? ,0.09 m? and 365 °F, respectively, has its state changed at constant pressure until temperature become 15 °C. How much heat is transferred from the gas and how much work is done on the gas during the process? Take R = 0.29 kJ/ kg K, Cp = 1.005 ki/kg k