Refrigerant-134a enters the coils of the evaporator of a refrigeration system as a saturated liquid-vapor mixture at a pressure of 140 kPa. The refrigerant absorbs 180 kJ of heat from the cooled space, which is maintained at 10°C, and leaves as saturated vapor at the same pressure. Determine (a) the entropy change of the refrigerant, (b) the entropy change of the cooled space, and (c ) the total entropy change for this process. -

Q: A steam at 8 kPa with an entropy of 6.4052 kJ/ kg - k is the output after the condensing process.…

A:

Q: In a production facility, 1.2-in-thick, 2-ft × 2-ft square brass plates (ρ = 532.5 lbm/ft3 and cp =…

A: Given data

Q: The isentropic efficiency of a nozzle is defined as the ratio of the actual kinetic energy of the…

A: The isentropic process is the process in which entropy of the fluid remains constant. The isentropic…

Q: Steam enters an adiabatic turbine steadily at 7 MPa, 500°C, and 45 m/s and leaves at 100 kPa and 75…

A: Given, P1=7 MPa T1=500°C V1= 45m/s P2 = 100 kPa=0.1Mpa V2= 75 m/s W=5 MW=5000 KW ηisentropic=…

Q: A piston-cylinder device is divided into two compartments, A and B, containing steam at pressure P =…

A:

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: the isentropic efficiency of the turbine, b) the power produced by this turbine

A: Given: Inlet conditions P1=80 bar= 8 MPa T1=450oC Exit conditions P2=1 bar=100 kPa T1=150oC mass…

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

A:

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 rigid, adiabatic container is filled through a single opening from a source of working fluid whose…

A: Let A rigid, adiabatic container is filled through a single opening from a source of working fluid…

Q: Refrigerant R-134a at 200 kPa and 90 ⁰C enters an adiabatic diffuser steadily with a velocity of 600…

A: Fluid= R134aInlet condition of R134a, P1=200 kPa, T1=90oC, V1=600 m/sExit condition of R134a, P2=10…

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…

A:

Q: What is the thermodynamic law that allows measurement of absolute entropy values of systems and pure…

A: In thermodynamics, there are four laws, namely zeroth law, first law, second law and third law of…

Q: What is entropy and its application?

A: Entropy measures randomness or disorder of the system or it is the measure of a system's thermal…

Q: . Water flows through a horizontal coil heated from the outside by high temperature flue gases. As…

A: Given data as per question The initial pressure of water =200 kpa The initial temperature of water =…

Q: 5 ft3 /s oT air is conmpressed in an adiabatic compressor from an initial state of 14.7 psi and 60…

A:

Q: Q1. In an adiabatic turbine steam enters at 45 m/s, 7 MPa and 500°C as shown in Figure Q1. The…

A: from the A-6 steam table we have to determine the initial enthalpy and entropy with the given…

Q: Q3: Steam enters an adiabatic turbine at 8 MPa, 550°C, and 15 m/s and leaves at 60 kPa, 150°C, and…

A: At state 1 P1=8MPa T1=550°C C1=13 m/s Using the superheated steam table h1=3521KJ/Kg S1=6.8778…

Q: In a food processing industry, steam and water are mixed to produce a continuous supply of hot…

A:

Q: A completely reversible heat pump produces heat at a rate of 300 kW to warm a house maintained at…

A: Given Heat produced= 300 kW Temperature of the house = 24o C = 297K Temperature of the ambient = 7o…

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

A:

Q: Q1) A super heated steam enters an adiabatic gas turbine at 12 bar and 500 °C and leaves at 400 Kpa…

A: Given:P1=12 bar =1200 KPaT1=500°C =773 KP2=400 KPaT2=150°C =423 KV1=25 m/sA1=0.1 m2A2=1.2 m2

Q: Forty Five grams per second of air flows through a gas turbine, expanding from 1350 kPa to 101 kPa…

A: Gas turbines are the mechanical devices which converts kinetic energy of gases into mechanical…

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: Water vapor enters the turbine at a steady state of 3 MPa pressure, 400°C temperature and 160 m/s…

A: Given data as per the question The pressure of water vapor at the entrance =3 Mpa The temperature of…

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: 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: Liquid water enters an adiabatic piping system at 15°C at a rate of 8 kg/s. If the water temperature…

A: Given data: The initial temperature, T1 = 15oC. The rise in temperature, ∆T = 0.2oC. The mass flow…

Q: Air in a large building is kept warm by heating it with steam in a heat exchanger. Saturated water…

A: The properties of saturated water vapor at 35o centigrade is taken from the saturated vapor table,…

Q: The pressure and temperature of air change from (6.000x10^0) bar to (2.0000x10^0) bar and from…

A:

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

A:

Q: Steam enters an adiabatic turbine at 5 MPa and 500°C with a 50 m/s velocity and exits from the…

A: Question (a) and (b) are solved here. For question (c), please post this question again.

Q: Water steam flows steadily through an adiabatic turbine. The inlet conditions of steam are 1.0 x 106…

A:

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

A:

Q: Consider a device into which a gas flows steadily at a constant temperature of 30 °C. Determine the…

A: Given:  T = 30 oC = 30 +273 = 303 K Q = -65 MW total rate of entropy change = ?

Q: Steam enters an adiabatic turbine steadily at 7 MPa, 500°C, and 45 m/s and leaves at 100 kPa and 75…

A:

Q: 2. Steam enters an adiabatic turbine steadily at 5 MPa and 500 °C and leaves at 50 kPa as saturated…

A:

Q: Steam enters an isothermal compressor at 400 C and 100 KPa . The exit pressure is 10 MPa. Determine…

A: Given data: The initial temperature in the compressor is Ti=400°C=673 K The initial pressure in the…

Q: Steam enters an adiabatic turbine steadily at 10 MPa and 650°C and leaves at 70 kPa as saturated…

A:

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.