FUND OF ENG THERMODYN(LLF)+WILEYPLUS
9th Edition
ISBN: 9781119391777
Author: MORAN
Publisher: WILEY
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A 30-lb iron casting, initially at 1500°F, is quenched in a tank filled with 2121 lb of oil, initially at 80°F. The iron casting and oil can be
modeled as incompressible with specific heats 0.10 Btu/lb. °R, and 0.45 Btu/lb. °R, respectively.
(a) For the iron casting and oil as the system,determine the final equilibrium temperature, in °F.
Ignore heat transfer between the system and its surroundings.
T+= 257.4978
(b) For the iron casting and oil as the system,determine the amount of entropy produced within the tank, in Btu/°R.
Ignore heat transfer between the system and its surroundings.
0 =
°F
i
Btu/°R
In a closed and rigid tank, five kg of oxygen (O2), initially at 430°C, exists. Heat transfer from the system to the surroundings occurs at 765 kJ. Assuming the ideal gas model and taking specific heats as constant at 600 K, determine the final temperature, in °C.
Air enters a compressor operating at steady state at 15 lbf/in.2, 80°F and exits at 375°F. Stray heat transfer and kinetic and potential energy effects are negligible.Assuming the ideal gas model for the air, determine the maximum theoretical pressure at the exit, in lbf/in.2
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- A 300-lb iron casting, initially at 600°F, is quenched in a tank filled with 2121 lb of oil, initially at 80°F. The iron casting and oil can be modeled as incompressible with specific heats 0.10 Btu/lb. °R, and 0.45 Btu/lb. °R, respectively. (a) For the iron casting and oil as the system,determine the final equilibrium temperature, in °F. Ignore heat transfer between the system and its surroundings. T₁ = i (b) For the iron casting and oil as the system,determine the amount of entropy produced within the tank, in Btu/°R. Ignore heat transfer between the system and its surroundings. J = °F Mi Btu/ºRarrow_forwardA 300-lb iron casting, initially at 1050°F, is quenched in a tank filled with 2121 lb of oil, initially at 80°F. The iron casting and oil can be modeled as incompressible with specific heats 0.10 Btu/lb · °R, and 0.45 Btu/lb · °R, respectively. (a) For the iron casting and oil as the system,determine the final equilibrium temperature, in °F. Ignore heat transfer between the system and its surroundings. Tf = i °F (b) For the iron casting and oil as the system,determine the amount of entropy produced within the tank, in Btu/°R. Ignore heat transfer between the system and its surroundings. O = i Btu/°R Touthoolk ond Mediearrow_forwardA 300-lb iron casting, initially at 1500°F, is quenched in a tank filled with 2121 Ib of oil, initially at 80°F. The iron casting and oil can be modeled as incompressible with specific heats 0.10 Btu/lb - °R, and 0.45 Btu/lb - °R, respectively. (a) For the iron casting and oil as the system,determine the final equilibrium temperature, in °F. Ignore heat transfer between the system and its surroundings. T= i °F (b) For the iron casting and oil as the system,determine the amount of entropy produced within the tank, in Btu/°R. Ignore heat transfer between the system and its surroundings. Btu/°Rarrow_forward
- A system consists of 2 kg of carbon dioxide gas initially at state 1, where p₁ = 1 bar, T₁ = 300 K. The system undergoes a power cycle consisting of the following processes: Process 1-2: Constant volume to p2 = 6 bar. Process 2-3: Expansion with pv¹.4 = constant. Process 3-1: Constant-pressure compression. Assuming the ideal gas model and neglecting kinetic and potential energy effects, calculate thermal efficiency.arrow_forwardAir within a piston-cylinder assembly, initially at 50 lbf/ in.², 510°R, and a volume of 6 ft³, is compressed isentropically to a final volume of 3 ft³. Assuming the ideal gas model with k = 1.4 for the air, determine the: (a) mass, in lb. (b) final pressure, in lbf/in.² (c) final temperature, in °R. (d) work, in Btu.arrow_forwardOne-tenth kmol of carbon monoxide (CO) in a piston- cylinder assembly undergoes a process from p1= 150 kPa, T1 = 300 K to p2 = 500 kPa, T2 = 470 K. For the process, W = -300 kJ. Employing the ideal gas model, determine: (a) the heat transfer, in kJ. (b) the change in entropy, in kJ/K.arrow_forward
- Air within a piston–cylinder assembly, initially at 33 lbf/ in.2, 510°R, and a volume of 6 ft3, is compressed isentropically to a final volume of 3 ft3.Assuming the ideal gas model with k = 1.4 for the air, determine the:(a) mass, in lb.(b) final pressure, in lbf/in.2(c) final temperature, in °R.(d) work, in Btu.arrow_forwardAir contained in a rigid, insulated tank fitted with a paddle wheel, initially at 300 K, 2 bar, and a volume of 2 m³, is stirred until its temperature is 600 K. Assuming the ideal gas model for the air, and ignoring kinetic and potential energy, determine: (a) the final pressure, in bar. (b) the work, in kJ. (c) the amount of entropy produced, in kJ/K. Solve using: (1) data from Table A-22. (2) constant c, read from Table A-20 at 400 K.arrow_forwardAir contained in a rigid, insulated tank fitted with a paddle wheel, initially at 4 bar, 40 °C, and a volume of 0.2 m, is stirred until its temperature is 353 °C. Assuming the ideal gas model with k = 1.4 for the air, determine (a) the final pressure, in bar (b) the work, in kJ (c) the amount of entropy produced, in kJ/K. Ignore kinetic and potential energy.arrow_forward
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