A Carnot machine extracts 100 KJ of heat from a reservoir at 800°C and transfers heat to the vicinity of 20°C. Calculate the change of entropy in the reservoir and its surroundings. Conclude what was the increase in laboratory entropy and the decrease in entropy in the sample?

Q: team with an enthalpy of 2843.5 KJ/kg undergoes a constant pressure process at 0.9 MPa until the…

A: Given:h1=2843.5 KJ/KgP1=P2=0.9 MPah2=2056.1 KJ/Kg NOTE: According to Bartleyby's guidelines we can…

Q: A Carnot engine delivers 130 kW of power by operating between temperature reservoirs at 160°C and…

A: GivenPower P=130kWT1=160oC=160+273=433KT2=1660oC=1933Kt=26min =26×60 s

Q: Q22. 0.25 kg of air at pressure of 140 kN/m2 occupies 0.15 m' and from this condition it is…

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Q: An insulated 8-m' rigid tank contains air at 800 kPa and 67°C. A valve connected to the tank is now…

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Q: The first law requires that the amount of energy lost by the hot solid be equal to the amount of…

A: First law of thermodynamics deals with conservation of energy for a closed system or a thermodynamic…

Q: Refrigerant-134a enters a compressor as a saturated vapor at 160 kPa at a rate of 0.03 m3/s and…

A: (a) The surrounding temperature is given as, The rate of change in entropy of the surrounding is…

Q: Fifteen (15) kg of liquid water at 10 MPa at 50°C. A) If the water is heated to 75°C, what is the…

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Q: Using the relation ds = (δQ/T)int rev for the definition of entropy, calculate the change in the…

A: The type of refrigerant is R-134A. The initial pressure of the refrigerant is P = 200 kPa. From the…

Q: Air at 500 kPa and 400 K enters an adiabatic nozzle at a velocity of 30 m/s and leaves at 300 kPa…

A: Given: The inlet temperature of the air in a nozzle is T1=400 K. The exit temperature of the air in…

Q: Saturated steam at 0.16 MPa is compressed in irreversible adiabatic process with an efficiency of…

A: Given   Initial pressure, P1 = 0.16 MPa     Final pressure, P2 = 0.45 MPa Find   Final entropy, s2

Q: A quantity of an ideal gas in an isolated system expanded isothermally and reversibly at 400 K from…

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Q: A 50-kg copper block initially at 80°C is dropped into an insulated tank that contains 0.120 m3 of…

A: Given data: The mass of the copper is mC=50 kg The initial temperature of copper is TCi=80°C=353 K…

Q: Steam at 228 and with a specific entropy of 6.1351 kj/kg-k undergoes a poly tropic process with…

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Q: In Prob, assume that the heat is transferred from the cold reservoir to the hot reservoir contrary…

A: Given data

Q: Five kg of air at 427°C and 600 kPa are contained in a piston–cylinder device. The air expands…

A: Given data: Mass of air, m = 5 kg Initial temperature, T1 = 4270C = 700 K Initial pressure, P1 = 600…

Q: The pressure and temperature of air change from (7.000x10^0) bar to (1.50x10^0) bar and from…

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Q: With your knowledge of the thermodynamic identity, derive a relationship for the heat capacities at…

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Q: Water vapor enters a turbine at 6 MPa and 400C, and leaves the turbine at 100 kPa with the same…

A: Given data as per question Water vapor pressure at entry= 6Mpa Temperature of vapor at entry = 4000…

Q: If you know that the change in entropy of a system where heat was added is 12 J/K, and that the…

A: To Find :  The amount of heat added to the system . Given : The change in entropy is ∆s=12 Jk. The…

Q: 10. Steam at 173.46 degrees celcius and with a specific entropy of 6 kJ/ kg K undergoes a polytropic…

A: Given:    steam     T1=173.46°C=173.46+273                         =446.16K     S1=6KJ/kg,…

Q: Refrigerant-134a enters a compressor as a saturated vapor at 160 kPa at a rate of 0.03 m3 /s and…

A: Given: The initial pressure P1=160 kPa. The final pressure is P2=0.03 m3/s. The entropy increase is…

Q: The pressure and temperature of air change from (5.000x10^0) bar to (1.000x10^0) bar and from…

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Q: Q.8 During the quenching process, a hot iron of mass 25kg and at a temperature of 450°c is dropped…

A: Data given -  mI = 25 kg  TI = 450°C = 723 K  CI = 0.5 kJ/kg K  moil = 180 kg  Toil = 20°C = 293 K…

Q: An insulated 8-m' rigid tank contains air at 800 kPa and 67°C. A valve connected to the tank is now…

A:

Q: Air is expanded in an adiabatic turbine of 90 percent isentropic efficiency from an inlet state of…

A: Given: The efficiency of is ƞ=0.9. The inlet and outlet pressures are P1=2800 kPa and P2=100 kPa.…

Q: K to another reservoir at 250 K. If entropy change of the hot reservoir is - 4 kJ/K, determine the…

A: given:entropy change of hot reservoir=-4kj/kT1=800KT2=250K

Q: There are 60,000 kcal/hr of heat extracted from 5.67 kg/s of carbon monoxide gas while the…

A: Given data: Q=60,000 kcal/hr=69.78 kWT=28°C=301 KPi=600 kPa Need to determine the change in entropy.

Q: A rigid insulated chamber of volume 2 m3 is divided into 2 equal parts by diaphram.One half of…

A: Given: The total volume of the chamber, V=2 m3 R=0.287 KJ/kg K T1=300 K P1=200 KPa

Q: 5-kg of air at 427C and 600 kPa are contained in a piston–cylinder device. The air expands…

A: Given data: Mass of air, m = 5 kg Initial pressure of air, P1 = 600 kPa Initial temperature of air,…

Q: Steam enters an adiabatic turbine at 8 MPa and 500°C at a rate of 18 kg/s, and exits at 0.2 MPa and…

A: Given data: The initial pressure, P1 = 8 MPa. The final pressure, P2 = 0.2 MPa. The initial…

Q: Refrigerant-134a enters a compressor as a saturated vapor at 160 kPa at a rate of 0.03 m3 /s and…

A: Compressor inlet          Pressure P1=160 kPa         Volume flow rate V1= 0.03 m3 /s Compressor…

Q: What is the total entropy change to expand water at 30 psia and 70 percent quality to 10 psia in a…

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Q: A closed system contains 10 kg of saturated liquid ammonia at 10°C. Heat addition required to…

A: Given: The temperature of saturated liquid ammonia, T= 10o C The mass of the saturated liquid…

Q: Three test tubes containing water. The first test tube containing 10 gm water at 25 °C, second test…

A: Heat transfer: the transfer of heat from one body to another body due to the temperature differences…

Q: Refrigerant-134a enters the coils of the evaporator of a refrigeration system as a saturated…

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Q: 18. 1m3 of air is heated at constant pressure from 15 to 300C, and is then cooled at constant volume…

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Q: What is the total entropy change to expand water at 30 psia and 70 percent quality to 10 psia in a…

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Q: The air in a piston-cylinder arrangement is compressed from 90 kPa and 20 oC to 400 kPa by a…

A: Given that ,  P1=90kPaT1=20°CP2=400kPa

Q: A quantity of an ideal gas in an isolated system expanded isothermally and reversibly at 400 K from…

A:

Q: Steam at a temperature of 250°C has specific volume of 0.15436 m^3/kg. What is the specific entropy…

A: Given data: temperature = 250°C specific volume  = 0.15436 m^3/kg To find:  specific entropy in k J…

Q: Steam at 200°C and with an entropy of 5.6105 kJ/kg.K expands isothermally to 0.515 MPa. For 7.146…

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Q: A quantity of an ideal gas in an isolated system expanded isothermally and reversibly at 400 K from…

A: Given: Heat absorbed by the gas=200J Temperature of the reservoir (T)=400K

Q: A quantity of an ideal gas in an isolated system expanded isothermally and reversibly at 400 K from…

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Q: Consider a system consisting of a hot body at 70°C and a cold body at 20°C. If 100 kJ of heat is…

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Q: Hot combustion gases enter the nozzle of a turbojet engine at 260 kPa, 747°C, and 80 m/s, and they…

A: Given Data: The inlet pressure is Pi = 260 kPa. The inlet velocity is Vi = 80 m/s. The inlet…

Entropy

In physics, entropy means the amount of disorder or the degree of randomness associated with a thermodynamic system. The system is not self-organized when the entropy of the system is high. For instance, when a system is at an elevated temperature, its molecules are in random motion, vibrating and colliding with each other. During this scenario, the probability of finding a molecule at a particular place twice, is low. Under this circumstance, the system can be said to be in a high entropy.