A rigid cylinder is filled with refrigerant-134a at 18°C. At this state, 40 percent of the mass is vapor. A valve at the bottom is opened, and refrigerant is withdrawn outside. Heat is transferred to the tank such that the temperature in the tank remains constant and the refrigerant fills the tank all the time (V1= V2). Determine the amount of heat that must be transferred by the time one-fourth of the total mass has been withdrawn. The tank volume is 0.1-m3

Q: A piston–cylinder device initially contains 1.4 kg of refrigerant-134a at 100 kPa and 20°C. Heat is…

A: Given data

Q: NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to…

A:

Q: Subcooled water at 5°C is pressurised to 350 kPa with no increase in temperature, and then passed…

A:

Q: expands at constant pressure of 172 kPa in piston-cylinder system from a temperature of 32 oC to a…

A: Given Data⇒ Mass of gas(m)=2 kg Constant pressure process  P=172 KPa Initial temperature…

Q: The pressure of a closed container with a constant volume of 30 liters is 300 kPa. What is the final…

A: Answer: 18.73 oC Using Table A-12 cengel thermodynamics textbook

Q: team enters an adiabatic turbine at the rate of 50 kg/sec. If the steam properties at the inlet are…

A:

Q: (4) A mass of 3.25 kg of R-134a fill a piston-cylinder device with and initial volume of 0.246 m³ at…

A: Given Data m=3.25 kg V1=0.246 m3 T1=-10.09°C T2=50 °C

Q: 3- A mass of 10 kg of saturated refrigerant-134a vapor is contained in a piston-cylinder device at…

A: Given data: Mass of saturated vapor refrigerant R-134a, m = 10 kg. The saturated vapor pressure in…

Q: (4) A mass of 3 kg of R-134a fill a piston-cylinder device with and initial volume of 0.279 m³ at a…

A: Refrigerant R-134a, also known as 1,1,1,2-tetrafluoroethane, R-134a, Freon 134a, Forane 134a,…

Q: Q1/ A frictionless piston–cylinder device initially contains 200 L of saturated liquid…

A: Given: Initial volume (V)=200L or 200×10-3m3Pressure P=900kPaFinal Temperature T2=70°C

Q: Subcooled water at 5°C is pressurised to 350 kPa with no increase in temperature, and then passed…

A:

Q: The work done during the expansion of a gas is 5.31 kJ. The relationship between the pressure and…

A: The work done for the given expansion process can be given as following - Work done =…

Q: ir is compressed into a 90 ft3 rigid tank until the pressure is 30.5 psia and the temperature…

A: Given          Volume, V = 90 ft3        Pressure, P = 30.5 psia Temperature, T = 580 R Find   Mass…

Q: A well-insulated 4-m × 4-m × 5-m room initially at 10°C is heated by the radiator of a steam heating…

A: Step-1 The dimension of room is: 4m X 4m X 5m. The initial temperature of the room is: T0 = 10 °C.…

Q: A piston–cylinder device initially contains 2 kg of refrigerant-134a at 800 kPa and 80°C. At this…

A: Given: The initial mass of the refrigerant in the piston-cylinder device is m1=2 kg. The final mass…

Q: 8-25 A mass of 8 kg of helium undergoes a process from an initial state of 3 m/kg and 15°C to a…

A: Refer thermodynamic tables, “Molar mass, gas constant and critical point properties”, and obtain the…

Q: Steam flows through an adiabatic turbine, entering at 1000 psia, 1100°F, and 300 ft/sec and exiting…

A: State 1: P1= 1000 psiaT1= 1100∘FV1= 300 ft/sec State 2: P2= 10 psiaT2= 300∘FV2= 600 ft/sec Power…

Q: An insulated piston-cylinder arrangement contains water. Sixty percent of the total 15 kg of water…

A: (a) To find: The amount of steam enters the cylinder. Given: The total mass is m1=15 kg. The mass of…

Q: In a piston-cylinder arrangement, energy is added and the piston is withdrawn in such a way that the…

A:

Q: A well-insulated 4-m × 4-m × 5-m room initially at 10°C is heated by the radiator of a steam heating…

A:

Q: A piston–cylinder device initially contains 0.6 kg of steam with a volume of 0.1 m3 . The mass of…

A: Given Data: Initial mass of steam is m1 = 0.6 kg. Initial volume of steam is V1 = 0.1 m3. Initial…

Q: In a closed system, volume changes from 1.5 m3 to 7.5 m3 and heat addition is 200 kJ. Calculate the…

A:

Q: Subcooled water at 5°C is pressurised to 350 kPa with no increase in temperature, and then passed…

A:

Q: 5-83 Refrigerant-134a at 700 kPa, 70°C, and 8 kg/min is cooled by water in a condenser until it…

A: Given Data The pressure of the refrigerant is: P=700 kPa The temperature of refrigerant is: T=70°C…

Q: A rigid tank of 0.22-m'volume initially contains saturated vapor refrigerant-134a at 1.2 MPa. The…

A:

Q: Why do we use enthalpy in place of Internal Energy In the energy Balance for open systems?

A: Given data: Enthalpy is used in place of internal energy because its gives more precise value of…

Q: Refrigerant-134a enters an adiabatic compressor as saturated vapor at 100 kPa at a rate of 0.7…

A: Given data: *The saturated vapour pressure of the refrigerant is P=100 kPa. *The flow rate of the…

Q: Water is contained in a cylinder/piston arrangement fitted with upper stops which limit the volume…

A:

Q: What is the value of the transferred heat? P: oblems 1. Ten cu ft of air at 300 psia and 400°F is…

A: Given: V1=V2=10ft3p1=300psiaT1=400 °FT2=140°F

Q: A rigid 0.5 m3 tank initially contains refrigerant-134a with 160 kPa and 40% dryness. Heat is…

A: Given data Volume (V1)= 0.5 m^3 Initial pressure (P1) = 160kpa Dryness fraction (x) = 40% = 0.4…

Q: A well-insulated rigid tank contains 3 kg of water at 200 kPa. Initially, half of the volume is in…

A:

Q: During a steady flow process, the pressure of the working substance drops from 200 to 20 psia, the…

A:

Q: Describe an imaginary process that violates both the first and the second laws of thermodynamics.

A: First last of thermodynamics, just discusses the changes that a system is undergoing. The…

Q: 5) Refrigerant-134a at 320 kPa and 40°C undergoes an iso- thermal process in a closed system until…

A:

Q: The radiator of a steam heating system has a volume of 20 L and is filled with superheated water…

A: Given, V = 20 L = 0.02 m3 P1 = 200 kPa T1 = 200°C T2 = 80°C The system undergoes constant volume…

Q: A well-insulated 4-m × 4-m × 5-m room initially at 10°C is heated by the radiator of a steam heating…

A: Given data T1=10°cV=15 LP1=200 KPaWfan=120 WP2=100 kPa

Q: A piston cylinder arrangement contains 0.02 m³ of air at 50°C and 400 kPa. Heat is added in the…

A: Given Data V1=0.02 m3 T1=50°C T2=700°C P=400 kPa=constant Q=-50 kJ

Q: The compressors of a production facility maintain the compressed-air lines at a (gauge) pressure of…

A: Given data Tair=20°cηc=0.8ηm=0.92Cd=0.65P2=700 KPaP1=101 KPa

Q: A 0.05-m3 rigid tank initially contains refrigerant134a at 0.8 MPa and 100 percent quality. The tank…

A: Given Volume of tank = 0.05 m3 Pressure in tank = 0.8 MPa Quality = 100% Valve pressure = 1.2 MPa…

Q: A student living in a 4m x 6m x 6m dormitory room turns on her 150 W fan before she leaves the room…

A: GivenV = 4 x 6 x 6 = 144 m3              1 or i - initial  ; F - FinalP = 150 w , SQ = 0t = 10 h , R…

Q: An adiabatic capillary tube is used in some refrigeration systems to drop the pressure of the…

A: For R134 table the value is chosen at 20 and 50 degree…

Q: Which of two gases—neon or air—produces more work when expanded from P1 to P2 in a closed-system…

A: The system in which neon and air are kept is same.So the pressure temperature nd volumes at initial…

Q: Argon is heated at 340 K with a mass flow of 3 kg/s while passing through a pipe. Given that the…

A:

Q: 6. An insulated piston-cylinder device contains 0.05 m3 of saturated refrigerant- 134a vapor at…

A:

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.