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Question 17 The heat transfer to the system, InkJ/kg. for the reversible process 1-2-3 shown in...
the heat transfer The heat transfer to the system, in kJ/kg. for the reversible process 1-2-3...
the heat transfer
The heat transfer to the system, in kJ/kg. for the reversible process 1-2-3 shown in the figure is closer TIKI 400 100 5 s (kl/kg.K) -400 200 o -300 100 00 300 0-200 400 Question 18
The heat transfer to the system, in kJ/kg, for the reversible process 1-2-3 shown in the...
The heat transfer to the system, in kJ/kg, for the reversible process 1-2-3 shown in the figure is closer T(K) 400 100 2 5 s (kl/kg.K) -400 200 -300 100 300 -200 400
5. (15) A closed system undergoes a process where heat transfer is allowed along the system...
5. (15) A closed system undergoes a process where heat transfer is allowed along the system boundary at constant temperature. For each case below, determine whether the change in entropy of the system is positive, negative, zero, or indeterminate. Explain your answer. a. Internally reversible process with heat transfer from the system to the surroundings b. Internally reversible process with heat transfer to the system from the surroundings; Internally reversible and adiabatic process; c. d. Internal irreversibilities present with heat...
Question 4 1 pts Problems 4.5.6 and are based on the following description Two kilograms of...
Question 4 1 pts Problems 4.5.6 and are based on the following description Two kilograms of water inside a piston cylinder device undergoes the process from state 1 to 3 shown in the p state 1 arep - 150 Pa and V, -0.002106m. At the final state are po 200 Pound V, 04. ApkPa) oor below. The initial conditionat Vim) 4. The work in from state 1 to 3 is closer to 59.7 39.8 159.1 136.9 2013 422.0 75.6 315...
Air as an idcal gas in a closed system undergoes a reversible process between temperatures of...
Air as an idcal gas in a closed system undergoes a reversible process between temperatures of 1000 K and 400 K. The beginning pressure is 200 bar Determine the highest possible ending pressure for this process. If the ending pressurc is 3 bar, determine the heat transfer and work per unit mass, if the boundary of the system is in constant contact with a reservoir at 400 K.
Question 3 (a) In a closed system, 0.93 kg of steam at 600 kPa and 200°C...
Question 3 (a) In a closed system, 0.93 kg of steam at 600 kPa and 200°C undergoes an isothermal and reversible process until 0.76 kg of saturated liquid water is obtained in the system. (i) Determine the entropy change of the mass. (5 marks) (ii) Determine the amount of heat transfer of the system during the process. (3 marks) (b) A two-cylinder two-stroke diesel engine operates on an ideal Diesel cycle, of which compression ratio is 22.5 and cutoff ratio...
straight line system is 7 kg. Compute the beat transfer for the process. -s coordinates below...
straight line system is 7 kg. Compute the beat transfer for the process. -s coordinates below shows a reversible process. The mass in the T(K) (5 points) 750 300 1.77 3.15 S(kJ/K) kJ ANSWER Nitrogen undergoes a constant pressure process in a closed system from 140 psi, 300 F to 120 F For nitrogen op 0.249 and cy 0.178 Btu/lbm R (a) Compute the change in specific enthalpy. (5 points) Btu/lbm ANSWER (b) Find the heat transfer if the system...
As shown in the figure, a reversible power cycle receives energy QH by heat transfer from...
As shown in the figure, a reversible power cycle receives energy
QH by heat transfer from a hot reservoir at TH and rejects energy
QC by heat transfer to a cold reservoir at TC.
a) If TH = 1600 K, TC = 400 K, what is the thermal
efficiency?
b) If TH = 500oC, TC = 20oC, and Wcycle = 1000 kJ, what are QH and
QC, each in kJ?
c) If ? = 60% and TC = 40oF, what...
Problems 1-3 are based on the following description Electrical energy is applied to a system enclosed...
Problems 1-3 are based on the following description Electrical energy is applied to a system enclosed inside the piston-cylinder device shown below. The voltage is 10 volts and the current is 2 amps for 20 seconds. During this time there is a heat transfer from the system to the outside equal to 903, the system expands 0.2 m at a constant pressure of 200 kPa The amount of electrical energy in J applied to the system is closer to: 200...
Problem 4 – Entropy transfer in a control volume (18 pts) An adiabatic reversible steam turbine...
Problem 4 – Entropy transfer in a control volume (18 pts) An
adiabatic reversible steam turbine steadily processes 2 kg/s of
steam at 5 MPa and 450°C, which is exhausted at 100 kPa and 100°C.
The turbine exhibits an isentropic efficiency of 0.85. a) Draw a
schematic representation of the system with all the energy
interactions involved. (2pts) b) Determine the h (kJ/kg) and s
(kJ/kg-K) at the inlet. (2 pts) c) Determine the actual h (kJ/kg)
and s (kJ/kg-K)...
the heat transfer
The heat transfer to the system, in kJ/kg. for the reversible process 1-2-3 shown in the figure is closer TIKI 400 100 5 s (kl/kg.K) -400 200 o -300 100 00 300 0-200 400 Question 18
The heat transfer to the system, in kJ/kg, for the reversible process 1-2-3 shown in the figure is closer T(K) 400 100 2 5 s (kl/kg.K) -400 200 -300 100 300 -200 400
5. (15) A closed system undergoes a process where heat transfer is allowed along the system boundary at constant temperature. For each case below, determine whether the change in entropy of the system is positive, negative, zero, or indeterminate. Explain your answer. a. Internally reversible process with heat transfer from the system to the surroundings b. Internally reversible process with heat transfer to the system from the surroundings; Internally reversible and adiabatic process; c. d. Internal irreversibilities present with heat...
Question 4 1 pts Problems 4.5.6 and are based on the following description Two kilograms of water inside a piston cylinder device undergoes the process from state 1 to 3 shown in the p state 1 arep - 150 Pa and V, -0.002106m. At the final state are po 200 Pound V, 04. ApkPa) oor below. The initial conditionat Vim) 4. The work in from state 1 to 3 is closer to 59.7 39.8 159.1 136.9 2013 422.0 75.6 315...
Air as an idcal gas in a closed system undergoes a reversible process between temperatures of 1000 K and 400 K. The beginning pressure is 200 bar Determine the highest possible ending pressure for this process. If the ending pressurc is 3 bar, determine the heat transfer and work per unit mass, if the boundary of the system is in constant contact with a reservoir at 400 K.
Question 3 (a) In a closed system, 0.93 kg of steam at 600 kPa and 200°C undergoes an isothermal and reversible process until 0.76 kg of saturated liquid water is obtained in the system. (i) Determine the entropy change of the mass. (5 marks) (ii) Determine the amount of heat transfer of the system during the process. (3 marks) (b) A two-cylinder two-stroke diesel engine operates on an ideal Diesel cycle, of which compression ratio is 22.5 and cutoff ratio...
straight line system is 7 kg. Compute the beat transfer for the process. -s coordinates below shows a reversible process. The mass in the T(K) (5 points) 750 300 1.77 3.15 S(kJ/K) kJ ANSWER Nitrogen undergoes a constant pressure process in a closed system from 140 psi, 300 F to 120 F For nitrogen op 0.249 and cy 0.178 Btu/lbm R (a) Compute the change in specific enthalpy. (5 points) Btu/lbm ANSWER (b) Find the heat transfer if the system...
As shown in the figure, a reversible power cycle receives energy
QH by heat transfer from a hot reservoir at TH and rejects energy
QC by heat transfer to a cold reservoir at TC.
a) If TH = 1600 K, TC = 400 K, what is the thermal
efficiency?
b) If TH = 500oC, TC = 20oC, and Wcycle = 1000 kJ, what are QH and
QC, each in kJ?
c) If ? = 60% and TC = 40oF, what...
Problems 1-3 are based on the following description Electrical energy is applied to a system enclosed inside the piston-cylinder device shown below. The voltage is 10 volts and the current is 2 amps for 20 seconds. During this time there is a heat transfer from the system to the outside equal to 903, the system expands 0.2 m at a constant pressure of 200 kPa The amount of electrical energy in J applied to the system is closer to: 200...
Problem 4 – Entropy transfer in a control volume (18 pts) An
adiabatic reversible steam turbine steadily processes 2 kg/s of
steam at 5 MPa and 450°C, which is exhausted at 100 kPa and 100°C.
The turbine exhibits an isentropic efficiency of 0.85. a) Draw a
schematic representation of the system with all the energy
interactions involved. (2pts) b) Determine the h (kJ/kg) and s
(kJ/kg-K) at the inlet. (2 pts) c) Determine the actual h (kJ/kg)
and s (kJ/kg-K)...
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