- 7.1P: Does the temperature in the Clausius inequality relation have to be...
- 7.2P: Does the cyclic integral of heat have to be zero (i.e., does a syst...
- 7.3P: Is a quantity whose cyclic integral is zero necessarily a property?
- 7.4P: To determine the entropy change for an irreversible process between...
- 7.5P: Is an isothermal process necessarily internally reversible? Explain...
- 7.6P: How do the values of the integral compare for a reversible- and irr...
- 7.7P: The entropy of a hot baked potato decreases as it cools. Is this a ...
- 7.8P: When a system is adiabatic, what can be said about the entropy chan...
- 7.9P: Work is entropy free, and sometimes the claim is made that work wil...
- 7.10P: A piston-cylinder device contains helium gas. During a reversible,...
- 7.11P: A piston-cylinder device contains nitrogen gas. During a reversible...
- 7.12P: A piston-cylinder device contains superheated steam. During an actu...
- 7.13P: The entropy of steam will (increase, decrease, remain the same) as ...
- 7.14P: The entropy of the working fluid of the ideal Carnot cycle (increas...
- 7.15P: The entropy of the working fluid of the ideal Carnot cycle (increas...
- 7.16P: During a heat transfer process, the entropy of a system (always, s...
- 7.17P: Steam is accelerated as it flows through an actual adiabatic nozzle...
- 7.18P: What three different mechanisms can cause the entropy of a control ...
- 7.19P: A completely reversible heat engine operates with a source at 1500 ...
- 7.20P: Air is compressed by a 15-kW compressor from The air temperature is...
- 7.21P: Heat in the amount of 100 kJ is transferred directly from a hot res...
- 7.22P: In the previous problem, assume that the heat is transferred from ...
- 7.23P: A completely reversible heat pump produces heat at a rate of 300 kW...
- 7.24P: During the isothermal heat addition process of a Carnot cycle, 900 ...
- 7.26P: During the isothermal heat rejection process of a Carnot cycle, the...
- 7.27P: Refrigerant-134a enters the coils of the evaporator of a refrigerat...
- 7.28P: Is a process that is internally reversible and adiabatic necessari...
- 7.29P: 2-lbm of water at 300 psia fill a weighted piston-cylinder device w...
- 7.30P: A well-insulated rigid tank contains 3 kg of a saturated liquid–vap...
- 7.31P: The radiator of a steam heating system has a volume of 20 L and is ...
- 7.32P: A rigid tank is divided into two equal parts by a partition. One pa...
- 7.33P: An insulated piston-cylinder device contains 5 L of saturated liqui...
- 7.34P: Saturated R-134a vapor enters a compressor at 6°F. At compressor ex...
- 7.35P: Water vapor enters a turbine at 6 MPa and 400°C, and leaves the tur...
- 7.36P: 1-kg of R-134a initially at 600 kPa and 25°C undergoes a process d...
- 7.37P: Refrigerant-134a is expanded isentropically from 600 kPa and 70°C a...
- 7.38P: A piston-cylinder device contains 1.2 kg of saturated water vapor a...
- 7.39P: Reconsider Prob. 7-44. Using EES (or other) software, evaluate and ...
- 7.40P: Refrigerant-134a at 320 kPa and 40°C undergoes an isothermal proces...
- 7.41P: A rigid tank contains 5 kg of saturated vapor steam at 100°C. The s...
- 7.42P: A rigid tank contains refrigerant-134a initially at 200 kPa and 40 ...
- 7.44P: Determine the heat transfer, in kJ/kg, for the reversible process 1...
- 7.45P: Calculate the heat transfer, in Btu/lbm, for the reversible process...
- 7.46P: Steam enters an adiabatic diffuser at 150 kPa and 120°C with a velo...
- 7.47P: Steam enters an adiabatic turbine at 800 psia and 900°F and leaves ...
- 7.49P: An isentropic steam turbine processes 2 kg/s of steam at 3 MPa, whi...
- 7.50P: Water at 70 kPa and 100°C is compressed isentropically in a closed ...
- 7.51P: 0.7-kg of R-134a is expanded isentropically from 800 kPa and 50°C t...
- 7.52P: 2-kg of saturated water vapor at 600 kPa are contained in a piston-...
- 7.53P: Steam enters a steady-flow adiabatic nozzle with a low inlet veloci...
- 7.54P: A rigid, 20-L steam cooker is arranged with a pressure relief valve...
- 7.55P: In Prob. 7–54, the water is stirred at the same time that it is bei...
- 7.56P: A piston-cylinder device contains 5 kg of steam at 100°C with a qua...
- 7.57P: A well-insulated rigid can initially contains refrigerant-134a at 9...
- 7.58P: An electric windshield defroster is used to remove 0.25-in of ice f...
- 7.59P: Consider two solid blocks, one hot and the other cold, brought into...
- 7.60P: A 50-kg copper block initially at 140°C is dropped into an insulate...
- 7.61P: Ten grams of computer chips with a specific heat of 0.3 kJ/kg?K are...
- 7.62P: A 25-kg iron block initially at 350°C is quenched in an insulated t...
- 7.63P: A 30-kg aluminum block initially at 140°C is brought into contact w...
- 7.64P: Reconsider Prob. 7-67. Using EES (or other) software, study the eff...
- 7.65P: A 30-kg iron block and a 40-kg copper block, both initially at 80°C...
- 7.66P: An adiabatic pump is to be used to compress saturated liquid water ...
- 7.67P: Some properties of ideal gases such as internal energy and enthalpy...
- 7.68P: Can the entropy of an ideal gas change during an isothermal process?
- 7.69P: An ideal gas undergoes a process between two specified temperature...
- 7.70P: Prove that the two relations for entropy change of ideal gases unde...
- 7.71P: Starting with the second T dsrelation (Eq. 7-26), obtain Eq. 7-34 f...
- 7.72P: Which of the two gases—helium or nitrogen experiences the greatest ...
- 7.73P: Air is expanded from 2000 kPa and 500°C to 100 kPa and 50°C. Assumi...
- 7.74P: What is the difference between the entropies of air at 15 psia and ...
- 7.75P: Oxygen gas is compressed in a piston–cylinder device from an initia...
- 7.76P: A insulated rigid tank contains 2.7 kg of carbon dioxide at 100 kPa...
- 7.77P: An insulated piston-cylinder device initially contains 300 L of ai...
- 7.78P: A piston-cylinder device contains 0.75 kg of nitrogen gas at 140 kP...
- 7.79P: Reconsider Prob. 7-83. Using EES (or other) software, investigate t...
- 7.80P: Air is compressed steadily by a 5-kW compressor from 100 kPa and 17...
- 7.81P: Air enters a nozzle steadily at 280 kPa and 77°C with a velocity of...
- 7.83P: A mass of 25 lbm of helium undergoes a process from an initial stat...
- 7.84P: 1-kg of air at 200 kPa and 127°C is contained in a piston-cylinder ...
- 7.85P: Nitrogen is compressed isentropically from 100 kPa and 27°C to 1000...
- 7.86P: Air at 3.5 MPa and 500°C is expanded in an adiabatic gas turbine to...
- 7.87P: Air is compressed in an isentropic compressor from 15 psia and 70°F...
- 7.88P: An insulated rigid tank is divided into two equal parts by a partit...
- 7.89P: An insulated rigid tank contains 4 kg of argon gas at 450 kPa and 3...
- 7.90P: Reconsider Prob. 7-92. Using EES (or other) software, investigate t...
- 7.91P: Air enters an adiabatic nozzle at 60 psia, 540°F, and 200 ft/s and ...
- 7.92P: Air at 257°C and 400 kPa is contained in a pistoncylinder device. T...
- 7.93P: Air at 27°C and 100 kPa is contained in a pistoncylinder device. Wh...
- 7.94P: Air is compressed in a piston-cylinder device from 90 kPa and 20°C ...
- 7.95P: Helium gas is compressed from 90 kPa and 30°C to 450 kPa in a rever...
- 7.96P: 5-kg of air at 427°C and 600 kPa are contained in a piston-cylinder...
- 7.97P: A container filled with 45 kg of liquid water at 95°C is placed in ...
- 7.98P: The well-insulated container shown in Fig. P7–98E is initially evac...
- 7.99P: In large compressors, the gas is frequently cooled while being comp...
- 7.100P: The turbines in steam power plants operate essentially under adiab...
- 7.101P: It is well known that the power consumed by a compressor can be re...
- 7.102P: Air is compressed isothermally from 13 psia and 90°F to 80 psia in ...
- 7.103P: Saturated water vapor at 150°C is compressed in a reversible steady...
- 7.104P: Calculate the work produced, in Btu/lbm, for the reversible steady-...
- 7.105P: Water enters the pump of a steam power plant as saturated liquid at...
- 7.106P: Liquid water enters a 16-kW pump at 100-kPa pressure at a rate of 5...
- 7.107P: Consider a steam power plant that operates between the pressure lim...
- 7.109P: Helium gas is compressed from 16 psia and 85°F to 120 psia at a rat...
- 7.110P: Reconsider Prob. 7-115E. Using EES (or other) software, evaluate an...
- 7.111P: Nitrogen gas is compressed from 80 kPa and 27°C to 480 kPa by a 10-...
- 7.112P: Saturated refrigerant-134a vapor at 15 psia is compressed reversibl...
- 7.113P: Describe the ideal process for an (a) adiabatic turbine, (b) adiab...
- 7.114P: Is the isentropic process a suitable model for compressors that ar...
- 7.115P: On a T-sdiagram, does the actual exit state (state 2) of an adiabat...
- 7.116P: Steam at 100 psia and 650°F is expanded adiabatically in a closed ...
- 7.117P: Steam enters an adiabatic turbine at 5 MPa, 650°C, and 80 m/s and l...
- 7.118P: Combustion gases enter an adiabatic gas turbine at 1540°F and 120 p...
- 7.119P: Steam at 4 MPa and 350°C is expanded in an adiabatic turbine to 12...
- 7.120P: Steam enters an adiabatic turbine at 8 MPa and 500°C with a mass fl...
- 7.122P: Carbon dioxide enters an adiabatic compressor at 100 kPa and 300 K ...
- 7.123P: A refrigeration unit compresses saturated R-134a vapor at 10°C to 1...
- 7.124P: Refrigerant-134a enters an adiabatic compressor as saturated vapor...
- 7.126P: Air is compressed by an adiabatic compressor from 95 kPa and 27°C t...
- 7.127P: Argon gas enters an adiabatic compressor at 14 psia and 75°F with a...
- 7.128P: Air enters an adiabatic nozzle at 45 psia and 940°F with low veloci...
- 7.129P: Reconsider Prob. 7-136E. Using EES (or other) software, study the e...
- 7.130P: The exhaust nozzle of a jet engine expands air at 300 kPa and 180°C...
- 7.131P: An adiabatic diffuser at the inlet of a jet engine increases the pr...
- 7.132P: Hot combustion gases enter the nozzle of a turbojet engine at 260 k...
- 7.134P: Oxygen enters an insulated 12-cm-diameter pipe with a velocity of 7...
- 7.135P: Nitrogen is compressed by an adiabatic compressor from 100 kPa and ...
- 7.136P: Air enters a compressor steadily at the ambient conditions of 100 k...
- 7.137P: Steam enters an adiabatic turbine steadily at 7 MPa, 500°C, and 45 ...
- 7.138P: In an ice-making plant, water at 0°C is frozen at atmospheric press...
- 7.139P: Water at 20 psia and 50°F enters a mixing chamber at a rate of 300 ...
- 7.140P: Steam is to be condensed on the shell side of a heat exchanger at 1...
- 7.141P: A well-insulated heat exchanger is to heat water from 25 to 60°C at...
- 7.142P: An adiabatic heat exchanger is to cool ethylene glycol flowing at a...
- 7.143P: A well-insulated, thin-walled, double-pipe, counter- flow heat exch...
- 7.144P: In a dairy plant, milk at 4°C is pasteurized continuously at 72°C a...
- 7.145P: An ordinary egg can be approximated as a 5.5-cm-diameter sphere. Th...
- 7.146P: Chickens with an average mass of 2.2 kg and average specific heat o...
- 7.147P: Carbon-steel balls mm in diameter are annealed by heating them firs...
- 7.148P: In a production facility, 1.2-in-thick, 2-ft 2-ft square brass plat...
- 7.149P: Long cylindrical steel rods (? = 7833 kg/m3 and cp= 0.465 kJ/kg-°C)...
- 7.150P: The inner and outer surfaces of a 4-m 10-m brick wall of thickness ...
- 7.151P: A frictionless piston-cylinder device contains saturated liquid wa...
- 7.152P: Steam enters a diffuser at 20 psia and 240°F with a velocity of 900...
- 7.153P: Steam enters an adiabatic nozzle at 2 MPa and 350°C with a velocity...
- 7.154P: Steam expands in a turbine steadily at a rate of 40,000 kg/h, enter...
- 7.155P: A hot-water stream at 70°C enters an adiabatic mixing chamber with...
- 7.156P: Liquid water at 200 kPa and 15°C is heated in a chamber by mixing i...
- 7.157P: A 0.18-m3 rigid tank is filled with saturated liquid water at 120°C...
- 7.158P: An iron block of unknown mass at 185°F is dropped into an insulated...
- 7.159P: Compressed air is one of the key utilities in manufacturing facilit...
- 7.160P: The compressed-air requirements of a plant at sea level are being m...
- 7.161P: A 150-hp compressor in an industrial facility is housed inside the ...
- 7.162P: The compressed-air requirements of a plant are being met by a 100-h...
- 7.163P: The compressed-air requirements of a plant are being met by a 90-hp...
- 7.164P: The compressed-air requirements of a plant are met by a 150-hp comp...
- 7.165P: The 1800-rpm, 150-hp motor of a compressor is burned out and is to ...
- 7.166P: The space heating of a facility is accomplished by natural gas heat...
- 7.167P: The compressors of a production facility maintain the compressed-ai...
- 7.168P: The energy used to compress air in the United States is estimated t...
- 7.169P: A heat engine whose thermal efficiency is 35 percent uses a hot res...
- 7.170P: A refrigerator with a coefficient of performance of 4 transfers hea...
- 7.171P: It has been suggested that air at 100 kPa and 25°C can be cooled by...
- 7.172P: 1-1bm of air at 10 psia and 70°F is contained in a piston-cylinder ...
- 7.173P: Can saturated water vapor at 200 kPa be condensed to a saturated li...
- 7.174P: A 100-lbm block of a solid material whose specific heat is 0.5 Btu/...
- 7.175P: A horizontal cylinder is separated into two compartments by an adia...
- 7.176P: A piston–cylinder device contains air that undergoes a reversible t...
- 7.177P: A piston–cylinder device initially contains of helium gas at 25 psi...
- 7.178P: A piston–cylinder device contains steam that undergoes a reversible...
- 7.179P: A 0.8-m3 rigid tank contains carbon dioxide (C02) gas at 250 K and ...
- 7.180P: Helium gas is throttled steadily from 400 kPa and 60°C. Heat is los...
- 7.181P: Air enters the evaporator section of a window air conditioner at 10...
- 7.182P: Refrigerant-134a enters a compressor as a saturated vapor at 160 kP...
- 7.183P: Air at 500 kPa and 400 K enters an adiabatic nozzle at a velocity o...
- 7.184P: 3-kg of helium gas at 100 kPa and 27°C are adiabatically compresse...
- 7.185P: An inventor claims to have invented an adiabatic steady-flow device...
- 7.186P: You are to expand a gas adiabatically from 3 MPa and 300°C to 80 kP...
- 7.187P: An adiabatic capillary tube is used in some refrigeration systems t...
- 7.188P: Determine the work input and entropy generation during the compress...
- 7.189P: Air is compressed steadily by a compressor from 100 kPa and 20°C to...
- 7.190P: Air is compressed steadily by a compressor from 100 kPa and 17°C to...
- 7.191P: Air enters a two-stage compressor at 100 kPa and 27°C and is compre...
- 7.192P: Steam at 6 MPa and 500°C enters a two-stage adiabatic turbine at a...
- 7.193P: Refrigerant-134a at 140 kPa and -10°C is compressed by an adiabatic...
- 7.194P: An adiabatic air compressor is to be powered by a direct-coupled ad...
- 7.195P: Reconsider Prob. 7-204. Using EES (or other) software, determine th...
- 7.196P: Air is expanded in an adiabatic turbine of 85 percent isentropic ef...
- 7.197P: Air is expanded in an adiabatic turbine of 90 percent isentropic ef...
- 7.198P: To control the power output of an isentropic steam turbine, a throt...
- 7.199P: Two rigid tanks are connected by a valve. Tank A is insulated and c...
- 7.200P: A 1200-W electric resistance heating element whose diameter is 0.5 ...
- 7.201P: A rigid tank initially contains refrigerant-134a at 60 psia and 100...
- 7.202P: A passive solar house that is losing heat to the outdoors at 3°C a...
- 7.203P: A steel container that has a mass of 75 lbm when empty is filled wi...
- 7.204P: In order to cool 1-ton of water at 20°C in an insulated tank, a per...
- 7.205P: One ton of liquid water at 80°C is brought into a well-insulated an...
- 7.206P: A well-insulated room initially at 10°C is heated by the radiator o...
- 7.207P: An insulated piston-cylinder device initially contains 0.02 m3 of ...
- 7.208P: Consider a 50-L evacuated rigid bottle that is surrounded by the at...
- 7.209P: (a) Water flows through a shower head steadily at a rate of 10 L/mi...
- 7.210P: Using EES (or other) software, determine the work input to a multis...
- 7.211P: The inner and outer surfaces of a window glass in winter are 10°C a...
- 7.212P: The inner and outer glasses of a doublepane window are at 18°C and ...
- 7.213P: A hot-water pipe at 80°C is losing heat to the surrounding air at 5...
- 7.214P: Consider the turbocharger of an internal combustion engine. The exh...
- 7.215P: A insulated piston–cylinder device initially contains 1.3 kg of air...
- 7.216P: When the transportation of natural gas in a pipeline is not feasibl...
- 7.217P: A constant volume tank filled with 2kg of air rejects heat to a hea...
- 7.218P: Consider two bodies of identical mass m and specific heat c used as...
- 7.219P: A heat engine receives heat from a constant volume tank filled with...
- 7.220P: For an ideal gas with constant specific heats show that the compres...
- 7.221P: Starting with the Gibbs equation du = Tds - Pdv,obtain the expressi...
- 7.222P: An initially empty rigid vessel is filled with a fluid from a sourc...
- 7.223P: The temperature of an ideal gas having constant specific heats is ...
- 7.224P: An ideal gas undergoes a reversible, steady-flow process in which p...
- 7.225P: The polytropic or small stage efficiency of a compressor is defined...
- 7.226P: Steam is compressed from 6 MPa and 300°C to 10 MPa isentropically. ...
- 7.227P: An apple with an average mass of 0.12 kg and average specific heat...
- 7.228P: A piston-cylinder device contains 5 kg of saturated water vapor at ...
- 7.229P: Steam expands in an adiabatic turbine from 4 MPa and 500°C to 0.1 M...
- 7.230P: Argon gas expands, in an adiabatic turbine from 3 MPa and 750°C to ...
- 7.231P: A unit mass of a substance undergoes an irreversible process from s...
- 7.232P: A unit mass of an ideal gas at temperature Tundergoes a reversible...
- 7.233P: Helium gas is compressed" from 27°C and 3.50m3/kg to 0.775 m3/kg in...
- 7.234P: Heat is lost through a plane wall steadily at a rate of 600 W. If t...
- 7.235P: Air is compressed steadily and adiabatically from 17°C and 90 kPa t...
- 7.236P: Argon gas expands in an adiabatic turbine steadily from 600 °C and ...
- 7.237P: Water enters a pump steadily at 100 kPa at a rate of 35 L/s and lea...
- 7.238P: Air is to be compressed steadily and isentropically from 1 atm to 1...
- 7.239P: Helium gas enters an adiabatic nozzle steadily at 500°C and 600 kPa...
- 7.240P: Combustion gases with a specific heat ratio of 1.3 enter an adiabat...
- 7.241P: Steam enters an adiabatic turbine steadily at 400°C and 5 MPa, and ...
- 7.242P: Liquid water enters an adiabatic piping system at 15°C at a rate of...
- 7.243P: Liquid water is to be compressed by a pump whose isentropic efficie...
- 7.244P: Steam enters an adiabatic turbine at 8 MPa and 500°C at a rate of 1...
- 7.245P: Helium gas is compressed steadily from 90 kPa and 25°C to 800 kPa a...
- 7.250P: You are designing a closed-system, isentropicexpansion process usin...

# Solutions for Chapter 7: Thermodynamics: An Engineering Approach 8th Edition

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ISBN: 9780073398174

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