Fundamentals Of Engineering Thermodynamics
9th Edition
ISBN: 9781119391388
Author: MORAN, Michael J., SHAPIRO, Howard N., Boettner, Daisie D., Bailey, Margaret B.
Publisher: Wiley,
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Thermodynamics: How do you solve this certain problem? Please show the step by step solution please
As shown in the figure below, a piston-cylinder assembly contains 20 g of air holding the piston against the stops, where the mass of
the piston is 150 kg. The air, initially at 3 bar, 600 K, is slowly cooled until the piston just begins to move downward in the cylinder. The
air behaves as an ideal gas, g = 9.81 m/s², and friction is negligible.
Patm = 1 bar
Piston
T₁ = 600 K
P₁ = 3 bar
Stops
-A=9.75 x 10-³ m²
As shown in the figure below, a piston-cylinder assembly contains 10 g of air holding the piston against the stops, where the mass of
the piston is 75 kg. The air, initially at 3 bar, 600 K, is slowly cooled until the piston just begins to move downward in the cylinder. The
air behaves as an ideal gas, g = 9.81 m/s², and friction is negligible.
Patm = 1 bar
Piston
Stops
A=9.75 x 103 m²
T₁=600 K
P₁ 3 bar
Determine the heat transfer, in kJ, between the air and its surroundings.
No gpt,only
Handwritten
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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. 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/°Rarrow_forwardX Your answer is incorrect. A rigid tank whose volume is 4 m³, initially containing air at 1 bar, 295 K, is connected by a valve to a large vessel holding air at 6 bar, 295 K. The valve is opened only as long as required to fill the tank with air to a pressure of 6 bar and a temperature of 350 K. Assuming the ideal gas model for the air, determine the heat transfer between the tank contents and the surroundings, in kJ. Qev = i 88.08 eTextbook and Media Hint Save for Later kJ Attempts: unlimited 4 Submit Answerarrow_forwardAir is compressed in a piston-cylinder assembly from p₁ = 10 lb/in², T₁ = 500°R, V₁ = 9 ft³ to a final volume of V₂ = 1 ft³ in a process described by pv¹.30 = constant. Assume ideal gas behavior and neglect kinetic and potential energy effects. Using constant specific heats evaluated at T₁, determine the work and the heat transfer, in Btu. Step 1 Your answer is correct. Determine the work, in Btu. W12 = -52.4075 Hint Step 2 * Your answer is incorrect. Determine the heat transfer, in Btu. Q12-13.4475 Btu eTextbook and Media Btu Attempts: 1 of 4 usedarrow_forward
- A 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_forwardsimple solutionarrow_forwardEquations of State for a gas;P.v = 0.004 (T + 273)U=U0+1,2 Tgiven in the form. In equations P: bar, v: m3/kg, U: kj / kg, t: C. Becomingthe initial volume of a piston cylinder system filled with gas,whose equations are given, is 0, 02m3, its temperature is 90 C, and its pressure is 4 bar. When the gas expands to a lower pressure,the work that the gas does is 3 kJ, and the heat that passes into the environment is 1.9 kJ. What is the final temperature of the gas?arrow_forward
- 1. A tank containing 250 kg of kerosene is to be heated from 20°C to 40 °C in 15 minutes, using 4 bar steam. The kerosene has a specific heat capacity of 2.0 kJ/kg-°C.over that temperature range. ha at 4.0 bar is 2,108.1 kJ/kg. The tank is well insulated and heat losses are negligible. Determine the rate of heat transfer required and steam flow.arrow_forwardAir is compressed in a piston-cylinder assembly from p₁ = 10 lb-/in², T₁= 500°R, V₁ = 9 ft³ to a final volume of V₂ = 1 ft³ in a process described by pv¹.30 = constant. Assume ideal gas behavior and neglect kinetic and potential energy effects. Using constant specific heats evaluated at T₁, determine the work and the heat transfer, in Btu. Step 1 Determine the work, in Btu. W12= Save for Later Btu Attempts: 0 of 4 used Step 2 The parts of this question must be completed in order. This part will be available when you complete the part above. Submit Answerarrow_forward2 kg of water vapor in a piston-cylinder assembly expands at a constant pressure of 300 kPa (3.0 Bar) from a saturated vapor state to a volume of 2.064 m³. a. Determine the initial temperature, in °C b. Determine the final temperature, in °C C. Determine the work for the process, in kJ. Water p= constant = 3.0 bar V22.064 m³ m = 2 kg State 1-2: Isochoric Processarrow_forward
- pls answer correctly thanksarrow_forwardAir of mass 1 kg, initially at 300 K and 10 bar, is allowed to expand isothermally till it reaches a pressure of 1 bar. Assuming air as an ideal gas with gas constant of 0.287 kJ/kg.K, what is the change inentropy of air.arrow_forward1.i just need the interpretation of this... Interpret this problem so that it would be easy for me to answer the problemarrow_forward
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