- 7.71C: Does the temperature in the Clausius inequality relation have to be...
- 7.72C: Does the cyclic integral of heat have to be zero (i.e., does a syst...
- 7.73C: Is a quantity whose cyclic integral is zero necessarily a property?
- 7.74C: To determine the entropy change for an irreversible process between...
- 7.75C: Is an isothermal process necessarily internally reversible? Explain...
- 7.76C: How do the values of the integral e1 2 dQ/T compare for a reversibl...
- 7.77C: The entropy of a hot baked potato decreases as it cools. Is this a ...
- 7.78C: When a system is adiabatic, what can be said about the entropy chan...
- 7.79C: Work is entropy free, and sometimes the claim is made that work wil...
- 7.710C: A pistoncylinder device contains helium gas. During a reversible, i...
- 7.711C: A pistoncylinder device contains nitrogen gas. During a reversible,...
- 7.712C: A pistoncylinder device contains superheated steam. During an actua...
- 7.713C: The entropy of steam will (increase, decrease, remain the same) as ...
- 7.714C: The entropy of the working fluid of the ideal Carnot cycle (increas...
- 7.715C: The entropy of the working fluid of the ideal Carnot cycle (increas...
- 7.716C: During a heat transfer process, the entropy of a system (always, so...
- 7.717C: team is accelerated as it flows through an actual adiabatic nozzle....
- 7.718C: What three different mechanisms can cause the entropy of a control ...
- 7.719E: A completely reversible heat engine operates with a source at 1500 ...
- 7.720: Air is compressed by a 15-kW compressor from P1 to P2. The air temp...
- 7.721: Heat in the amount of 100 kJ is transferred directly from a hot res...
- 7.722: In Prob. 7-21, assume that the heat is transferred from the cold re...
- 7.723: A completely reversible heat pump produces heat at a rate of 300 kW...
- 7.724: During the isothermal heat addition process of a Carnot cycle, 900 ...
- 7.725: Reconsider Prob. 7-24. Using EES (or other) software, study the eff...
- 7.726E: During the isothermal heat rejection process of a Carnot cycle, the...
- 7.727: Refrigerant-134a enters the coils of the evaporator of a refrigerat...
- 7.728C: Is a process that is internally reversible and adiabatic necessaril...
- 7.729E: 2-lbm of water at 300 psia fill a weighted pistoncylinder device wh...
- 7.730: A well-insulated rigid tank contains 3 kg of a saturated liquidvapo...
- 7.731: The radiator of a steam heating system has a volume of 20 L and is ...
- 7.732: A rigid tank is divided into two equal parts by a partition. One pa...
- 7.733: An insulated pistoncylinder device contains 5 L of saturated liquid...
- 7.734E: Saturated R-134a vapor enters a compressor at 68F. At compressor ex...
- 7.735: Water vapor enters a turbine at 6 MPa and 4008C, and leaves the tur...
- 7.736: 1-kg of R-134a initially at 600 kPa and 258C undergoes a process du...
- 7.737: Refrigerant-134a is expanded isentropically from 600 kPa and 708C a...
- 7.738: A pistoncylinder device contains 1.2 kg of saturated water vapor at...
- 7.739: Reconsider Prob. 738. Using EES (or other) software, evaluate and p...
- 7.740: Refrigerant-134a at 320 kPa and 408C undergoes an isothermal proces...
- 7.741: A rigid tank contains 5 kg of saturated vapor steam at 1008C. The s...
- 7.742: A 0.5-m3 rigid tank contains refrigerant-134a initially at 200 kPa ...
- 7.743: Reconsider Prob. 742. Using EES (or other) software, investigate th...
- 7.744: Determine the heat transfer, in kJ/kg, for the reversible process 1...
- 7.745E: Calculate the heat transfer, in Btu/lbm, for the reversible process...
- 7.746: Steam enters an adiabatic diffuser at 150 kPa and 1208C with a velo...
- 7.747E: Steam enters an adiabatic turbine at 800 psia and 9008F and leaves ...
- 7.748E: Reconsider Prob. 747E. Using EES (or other) software, evaluate and ...
- 7.749: An isentropic steam turbine processes 2 kg/s of steam at 3 MPa, whi...
- 7.750: Water at 70 kPa and 1008C is compressed isentropically in a closed ...
- 7.751: 0.7-kg of R-134a is expanded isentropically from 800 kPa and 508C t...
- 7.752: 2-kg of saturated water vapor at 600 kPa are contained in a piston-...
- 7.753: Steam enters a steady-flow adiabatic nozzle with a low inlet veloci...
- 7.754: A rigid, 20-L steam cooker is arranged with a pressure relief valve...
- 7.755: In Prob. 754, the water is stirred at the same time that it is bein...
- 7.756: A pistoncylinder device contains 5 kg of steam at 1008C with a qual...
- 7.757E: A 0.55-ft3 well-insulated rigid can initially contains refrigerant-...
- 7.758E: An electric windshield defroster is used to remove 0.25-in of ice f...
- 7.759C: Consider two solid blocks, one hot and the other cold, brought into...
- 7.760: A 50-kg copper block initially at 1408C is dropped into an insulate...
- 7.761: 10-grams of computer chips with a specific heat of 0.3 kJ/kgK are i...
- 7.762: A 25-kg iron block initially at 3508C is quenched in an insulated t...
- 7.763: A 30-kg aluminum block initially at 1408C is brought into contact w...
- 7.764: Reconsider Prob. 763. Using EES (or other) software, study the effe...
- 7.765: A 30-kg iron block and a 40-kg copper block, both initially at 808C...
- 7.766: An adiabatic pump is to be used to compress saturated liquid water ...
- 7.767C: Some properties of ideal gases such as internal energy and enthalpy...
- 7.768C: Can the entropy of an ideal gas change during an isothermal process?
- 7.769C: An ideal gas undergoes a process between two specified temperatures...
- 7.770: Prove that the two relations for entropy change of ideal gases unde...
- 7.771: Starting with the second T ds relation (Eq. 726), obtain Eq. 734 fo...
- 7.772: Which of the two gaseshelium or nitrogen experiences the greatest e...
- 7.773: Air is expanded from 2000 kPa and 5008C to 100 kPa and 508C. Assumi...
- 7.774E: What is the difference between the entropies of air at 15 psia and ...
- 7.775: Oxygen gas is compressed in a pistoncylinder device from an initial...
- 7.776: A 1.5-m3 insulated rigid tank contains 2.7 kg of carbon dioxide at ...
- 7.777: An insulated pistoncylinder device initially contains 300 L of air ...
- 7.778: A pistoncylinder device contains 0.75 kg of nitrogen gas at 140 kPa...
- 7.779: Reconsider Prob. 778. Using EES (or other) software, investigate th...
- 7.780: Air is compressed steadily by a 5-kW compressor from 100 kPa and 17...
- 7.781: Air enters a nozzle steadily at 280 kPa and 778C with a velocity of...
- 7.782: Reconsider Prob. 781. Using EES (or other) software, study the effe...
- 7.783E: A mass of 25 lbm of helium undergoes a process from an initial stat...
- 7.784: 1-kg of air at 200 kPa and 1278C is contained in a piston-cylinder ...
- 7.785: Nitrogen is compressed isentropically from 100 kPa and 278C to 1000...
- 7.786: Air at 3.5 MPa and 5008C is expanded in an adiabatic gas turbine to...
- 7.787E: Air is compressed in an isentropic compressor from 15 psia and 708F...
- 7.788: An insulated rigid tank is divided into two equal parts by a partit...
- 7.789: An insulated rigid tank contains 4 kg of argon gas at 450 kPa and 3...
- 7.790: Reconsider Prob. 789. Using EES (or other) software, investigate th...
- 7.791E: Air enters an adiabatic nozzle at 60 psia, 5408F, and 200 ft/s and ...
- 7.792: Air at 2578C and 400 kPa is contained in a pistoncylinder device. T...
- 7.793: Air at 278C and 100 kPa is contained in a pistoncylinder device. Wh...
- 7.794: Air is compressed in a piston-cylinder device from 90 kPa and 208C ...
- 7.795: Helium gas is compressed from 90 kPa and 308C to 450 kPa in a rever...
- 7.796: 5-kg of air at 4278C and 600 kPa are contained in a piston-cylinder...
- 7.797: A container filled with 45 kg of liquid water at 958C is placed in ...
- 7.798E: The well-insulated container shown in Fig. P798E is initially evacu...
- 7.799C: In large compressors, the gas is frequently cooled while being comp...
- 7.7100C: The turbines in steam power plants operate essentially under adiaba...
- 7.7101C: It is well known that the power consumed by a compressor can be red...
- 7.7102E: Air is compressed isothermally from 13 psia and 908F to 80 psia in ...
- 7.7103: Saturated water vapor at 1508C is compressed in a reversible steady...
- 7.7104E: Calculate the work produced, in Btu/lbm, for the reversible steady-...
- 7.7105: Water enters the pump of a steam power plant as saturated liquid at...
- 7.7106: Liquid water enters a 16-kW pump at 100-kPa pressure at a rate of 5...
- 7.7107: Consider a steam power plant that operates between the pressure lim...
- 7.7108: Reconsider Prob. 7107. Using EES (or other) software, investigate t...
- 7.7109E: Helium gas is compressed from 16 psia and 858F to 120 psia at a rat...
- 7.7110E: Reconsider Prob. 7109E. Using EES (or other) software, evaluate and...
- 7.7111: Nitrogen gas is compressed from 80 kPa and 278C to 480 kPa by a 10-...
- 7.7112E: Saturated refrigerant-134a vapor at 15 psia is compressed reversibl...
- 7.7113C: Describe the ideal process for an (a) adiabatic turbine, (b) adiaba...
- 7.7114C: Is the isentropic process a suitable model for compressors that are...
- 7.7115C: On a T-s diagram, does the actual exit state (state 2) of an adiaba...
- 7.7116E: Steam at 100 psia and 6508F is expanded adiabatically in a closed s...
- 7.7117: Steam enters an adiabatic turbine at 5 MPa, 6508C, and 80 m/s and l...
- 7.7118E: Combustion gases enter an adiabatic gas turbine at 15408F and 120 p...
- 7.7119: Steam at 4 MPa and 3508C is expanded in an adiabatic turbine to 120...
- 7.7120: Steam enters an adiabatic turbine at 8 MPa and 5008C with a mass fl...
- 7.7121: Reconsider Prob. 7120. Using EES (or other) software, study the eff...
- 7.7122: Carbon dioxide enters an adiabatic compressor at 100 kPa and 300 K ...
- 7.7123: A refrigeration unit compresses saturated R-134a vapor at 108C to 1...
- 7.7124: Refrigerant-134a enters an adiabatic compressor as saturated vapor ...
- 7.7125: Reconsider Prob. 7124. Using EES (or other) software, redo the prob...
- 7.7126: Air is compressed by an adiabatic compressor from 95 kPa and 278C t...
- 7.7127E: Argon gas enters an adiabatic compressor at 14 psia and 758F with a...
- 7.7128E: Air enters an adiabatic nozzle at 45 psia and 9408F with low veloci...
- 7.7129E: Reconsider Prob. 7128E. Using EES (or other) software, study the ef...
- 7.7130: The exhaust nozzle of a jet engine expands air at 300 kPa and 1808C...
- 7.7131E: An adiabatic diffuser at the inlet of a jet engine increases the pr...
- 7.7132: Hot combustion gases enter the nozzle of a turbojet engine at 260 k...
- 7.7133E: Refrigerant-134a is expanded adiabatically from 100 psia and 1008F ...
- 7.7134: Oxygen enters an insulated 12-cm-diameter pipe with a velocity of 7...
- 7.7135: Nitrogen is compressed by an adiabatic compressor from 100 kPa and ...
- 7.7136: Air enters a compressor steadily at the ambient conditions of 100 k...
- 7.7137: Steam enters an adiabatic turbine steadily at 7 MPa, 5008C, and 45 ...
- 7.7138: In an ice-making plant, water at 08C is frozen at atmospheric press...
- 7.7139E: Water at 20 psia and 508F enters a mixing chamber at a rate of 300 ...
- 7.7140E: Steam is to be condensed on the shell side of a heat exchanger at 1...
- 7.7141: A well-insulated heat exchanger is to heat water (cp 5 4.18 kJ/kg?8...
- 7.7142: An adiabatic heat exchanger is to cool ethylene glycol (cp 5 2.56 k...
- 7.7143: A well-insulated, thin-walled, double-pipe, counter-flow heat excha...
- 7.7144: In a dairy plant, milk at 48C is pasteurized continuously at 728C a...
- 7.7145: An ordinary egg can be approximated as a 5.5-cmdiameter sphere. The...
- 7.7146: Chickens with an average mass of 2.2 kg and average specific heat o...
- 7.7147: Carbon-steel balls (r 5 7833 kg/m3 and cp 5 0.465 kJ/kg?8C) 8 mm in...
- 7.7148E: In a production facility, 1.2-in-thick, 2-ft 3 2-ft square brass pl...
- 7.7149: Long cylindrical steel rods (r 5 7833 kg/m3 and cp 5 0.465 kJ/kg8C)...
- 7.7150: The inner and outer surfaces of a 4-m 3 10-m brick wall of thicknes...
- 7.7151E: A frictionless pistoncylinder device contains saturated liquid wate...
- 7.7152E: Steam enters a diffuser at 20 psia and 2408F with a velocity of 900...
- 7.7153: Steam enters an adiabatic nozzle at 2 MPa and 3508C with a velocity...
- 7.7154: Steam expands in a turbine steadily at a rate of 40,000 kg/h, enter...
- 7.7155: A hot-water stream at 708C enters an adiabatic mixing chamber with ...
- 7.7156: Liquid water at 200 kPa and 158C is heated in a chamber by mixing i...
- 7.7157: A 0.18-m3 rigid tank is filled with saturated liquid water at 1208C...
- 7.7158E: An iron block of unknown mass at 1858F is dropped into an insulated...
- 7.7159: Compressed air is one of the key utilities in manufacturing facilit...
- 7.7160: The compressed-air requirements of a plant at sea level are being m...
- 7.7161: A 150-hp compressor in an industrial facility is housed inside the ...
- 7.7162: The compressed-air requirements of a plant are being met by a 100-h...
- 7.7163: The compressed-air requirements of a plant are being met by a 90-hp...
- 7.7164: The compressed-air requirements of a plant are met by a 150-hp comp...
- 7.7165: The 1800-rpm, 150-hp motor of a compressor is burned out and is to ...
- 7.7166: The space heating of a facility is accomplished by natural gas heat...
- 7.7167: The compressors of a production facility maintain the compressed-ai...
- 7.7168: The energy used to compress air in the United States is estimated t...
- 7.7169E: A heat engine whose thermal efficiency is 35 percent uses a hot res...
- 7.7170: A refrigerator with a coefficient of performance of 4 transfers hea...
- 7.7171: It has been suggested that air at 100 kPa and 258C can be cooled by...
- 7.7172E: 1-1bm of air at 10 psia and 708F is contained in a piston-cylinder ...
- 7.7173: Can saturated water vapor at 200 kPa be condensed to a saturated li...
- 7.7174E: A 100-lbm block of a solid material whose specific heat is 0.5 Btu/...
- 7.7175: A horizontal cylinder is separated into two compartments by an adia...
- 7.7176: A pistoncylinder device contains air that undergoes a reversible th...
- 7.7177: A pistoncylinder device initially contains 15 ft3 of helium gas at ...
- 7.7178: A pistoncylinder device contains steam that undergoes a reversible ...
- 7.7179: A 0.8-m3 rigid tank contains carbon dioxide (CO2) gas at 250 K and ...
- 7.7180: Helium gas is throttled steadily from 400 kPa and 608C. Heat is los...
- 7.7181: Air enters the evaporator section of a window air conditioner at 10...
- 7.7182: Refrigerant-134a enters a compressor as a saturated vapor at 160 kP...
- 7.7183: Air at 500 kPa and 400 K enters an adiabatic nozzle at a velocity o...
- 7.7184: 3-kg of helium gas at 100 kPa and 278C are adiabatically compressed...
- 7.7185: An inventor claims to have invented an adiabatic steady-flow device...
- 7.7186: You are to expand a gas adiabatically from 3 MPa and 3008C to 80 kP...
- 7.7187: An adiabatic capillary tube is used in some refrigeration systems t...
- 7.7188: Determine the work input and entropy generation during the compress...
- 7.7189: Air is compressed steadily by a compressor from 100 kPa and 208C to...
- 7.7190: Air is compressed steadily by a compressor from 100 kPa and 178C to...
- 7.7191: Air enters a two-stage compressor at 100 kPa and 278C and is compre...
- 7.7192: Steam at 6 MPa and 5008C enters a two-stage adiabatic turbine at a ...
- 7.7193: Refrigerant-134a at 140 kPa and 2108C is compressed by an adiabatic...
- 7.7194: An adiabatic air compressor is to be powered by a direct-coupled ad...
- 7.7195: Reconsider Prob. 7194. Using EES (or other) software, determine the...
- 7.7196: Air is expanded in an adiabatic turbine of 85 percent isentropic ef...
- 7.7197: Air is expanded in an adiabatic turbine of 90 percent isentropic ef...
- 7.7198: To control the power output of an isentropic steam turbine, a throt...
- 7.7199: Two rigid tanks are connected by a valve. Tank A is insulated and c...
- 7.7200: A 1200-W electric resistance heating element whose diameter is 0.5 ...
- 7.7201E: A 5-ft3 rigid tank initially contains refrigerant-134a at 60 psia a...
- 7.7202: A passive solar house that is losing heat to the outdoors at 38C at...
- 7.7203E: A 15-ft3 steel container that has a mass of 75 lbm when empty is fi...
- 7.7204: In order to cool 1-ton of water at 208C in an insulated tank, a per...
- 7.7205: One ton of liquid water at 808C is brought into a well-insulated an...
- 7.7206: A well-insulated 4-m 3 4-m 3 5-m room initially at 108C is heated b...
- 7.7207: An insulated pistoncylinder device initially contains 0.02 m3 of sa...
- 7.7208: Consider a 50-L evacuated rigid bottle that is surrounded by the at...
- 7.7209: (a) Water flows through a shower head steadily at a rate of 10 L/mi...
- 7.7210: Using EES (or other) software, determine the work input to a multis...
- 7.7211: The inner and outer surfaces of a 2-m 3 2-m window glass in winter ...
- 7.7212: The inner and outer glasses of a 2-m 3 2-m doublepane window are at...
- 7.7213: A hot-water pipe at 808C is losing heat to the surrounding air at 5...
- 7.7214: Consider the turbocharger of an internal combustion engine. The exh...
- 7.7215: A 0.40-m3 insulated pistoncylinder device initially contains 1.3 kg...
- 7.7216: When the transportation of natural gas in a pipeline is not feasibl...
- 7.7217: A constant volume tank filled with 2 kg of air rejects heat to a he...
- 7.7218: Consider two bodies of identical mass m and specific heat c used as...
- 7.7219: A heat engine receives heat from a constant volume tank filled with...
- 7.7220: For an ideal gas with constant specific heats show that the compres...
- 7.7221: Starting with the Gibbs equation dh 5 T ds 1 vdP, obtain the expres...
- 7.7222: An initially empty rigid vessel is filled with a fluid from a sourc...
- 7.7223: The temperature of an ideal gas having constant specific heats is g...
- 7.7224: An ideal gas undergoes a reversible, steady-flow process in which p...
- 7.7225: The polytropic or small stage efficiency of a compressor h`,C is de...
- 7.7226: Steam is compressed from 6 MPa and 3008C to 10 MPa isentropically. ...
- 7.7227: An apple with an average mass of 0.12 kg and average specific heat ...
- 7.7228: A pistoncylinder device contains 5 kg of saturated water vapor at 3...
- 7.7229: Steam expands in an adiabatic turbine from 4 MPa and 5008C to 0.1 M...
- 7.7230: Argon gas expands in an adiabatic turbine from 3 MPa and 7508C to 0...
- 7.7231: A unit mass of a substance undergoes an irreversible process from s...
- 7.7232: A unit mass of an ideal gas at temperature T undergoes a reversible...
- 7.7233: Helium gas is compressed from 278C and 3.50 m3 /kg to 0.775 m3 /kg ...
- 7.7234: Heat is lost through a plane wall steadily at a rate of 600 W. If t...
- 7.7235: Air is compressed steadily and adiabatically from 178C and 90 kPa t...
- 7.7236: Argon gas expands in an adiabatic turbine steadily from 6008C and 8...
- 7.7237: Water enters a pump steadily at 100 kPa at a rate of 35 L/s and lea...
- 7.7238: Air is to be compressed steadily and isentropically from 1 atm to 1...
- 7.7239: Helium gas enters an adiabatic nozzle steadily at 5008C and 600 kPa...
- 7.7240: Combustion gases with a specific heat ratio of 1.3 enter an adiabat...
- 7.7241: Steam enters an adiabatic turbine steadily at 4008C and 5 MPa, and ...
- 7.7242: Liquid water enters an adiabatic piping system at 158C at a rate of...
- 7.7243: Liquid water is to be compressed by a pump whose isentropic efficie...
- 7.7244: Steam enters an adiabatic turbine at 8 MPa and 5008C at a rate of 1...
- 7.7245: Helium gas is compressed steadily from 90 kPa and 258C to 800 kPa a...
- 7.7246: Compressors powered by natural gas engines are increasing in popula...
- 7.7247: It is well-known that the temperature of a gas rises while it is co...
- 7.7248: Identify the major sources of entropy generation in your house and ...
- 7.7249: Obtain the following information about a power plant that is closes...
- 7.7250: You are designing a closed-system, isentropicexpansion process usin...

# Solutions for Chapter 7: ENTROPY

## Full solutions for Thermodynamics: An Engineering Approach | 8th Edition

ISBN: 9780073398174

Solutions for Chapter 7: ENTROPY

Get Full SolutionsThis expansive textbook survival guide covers the following chapters and their solutions. Since 250 problems in chapter 7: ENTROPY have been answered, more than 8103 students have viewed full step-by-step solutions from this chapter. This textbook survival guide was created for the textbook: Thermodynamics: An Engineering Approach, edition: 8. Chapter 7: ENTROPY includes 250 full step-by-step solutions. Thermodynamics: An Engineering Approach was written by Sieva Kozinsky and is associated to the ISBN: 9780073398174.

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