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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Chapter 3, Problem 3.76P
To determine
Work transfer and heat transfer.
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Nitrogen (N2) gas within a piston-cylinder assembly undergoes a process from p1 = 25 bar, V1 = 0.8 m3 to a state where V2 = 3.5 m3. The relationship between pressure and volume during the process is pV1.5 = constant. For the N2, determine (a) the pressure at state 2, in bar, and (b) the work, in kJ. Will nitrogen gas be expanded or compressed at the end of the process?
Air 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 used
A closed system consists of gas of 2 kg initially in state 1 with p1 = 4bar and specific volume
1m3 /kg. The system undergoes a power cycle consisting of the following
V1 =
processes:
Process 1-2: polytropic process to v2 = 2m³/kg, P2 = 1bar;
Process 2-3: isobaric compression to v1;
Process 3-1: isochoric process to P1.
Write the formula for the cycle work. Determine Wcycle
and Qcycle-
Chapter 3 Solutions
Fundamentals Of Engineering Thermodynamics
Ch. 3 - Prob. 3.1ECh. 3 - Prob. 3.2ECh. 3 - Prob. 3.3ECh. 3 - Prob. 3.4ECh. 3 - Prob. 3.6ECh. 3 - Prob. 3.7ECh. 3 - Prob. 3.8ECh. 3 - Prob. 3.9ECh. 3 - Prob. 3.10ECh. 3 - Prob. 3.11E
Ch. 3 - Prob. 3.12ECh. 3 - Prob. 3.13ECh. 3 - Prob. 3.1CUCh. 3 - Prob. 3.2CUCh. 3 - Prob. 3.3CUCh. 3 - Prob. 3.4CUCh. 3 - Prob. 3.5CUCh. 3 - Prob. 3.6CUCh. 3 - Prob. 3.7CUCh. 3 - Prob. 3.8CUCh. 3 - Prob. 3.9CUCh. 3 - Prob. 3.10CUCh. 3 - Prob. 3.11CUCh. 3 - Prob. 3.12CUCh. 3 - Prob. 3.13CUCh. 3 - Prob. 3.14CUCh. 3 - Prob. 3.15CUCh. 3 - Prob. 3.16CUCh. 3 - Prob. 3.17CUCh. 3 - Prob. 3.18CUCh. 3 - Prob. 3.19CUCh. 3 - Prob. 3.20CUCh. 3 - Prob. 3.21CUCh. 3 - Prob. 3.22CUCh. 3 - Prob. 3.23CUCh. 3 - Prob. 3.24CUCh. 3 - Prob. 3.25CUCh. 3 - Prob. 3.26CUCh. 3 - Prob. 3.27CUCh. 3 - Prob. 3.28CUCh. 3 - Prob. 3.29CUCh. 3 - Prob. 3.30CUCh. 3 - Prob. 3.31CUCh. 3 - Prob. 3.32CUCh. 3 - Prob. 3.33CUCh. 3 - Prob. 3.34CUCh. 3 - Prob. 3.35CUCh. 3 - Prob. 3.36CUCh. 3 - Prob. 3.37CUCh. 3 - Prob. 3.38CUCh. 3 - Prob. 3.39CUCh. 3 - Prob. 3.40CUCh. 3 - Prob. 3.41CUCh. 3 - Prob. 3.42CUCh. 3 - Prob. 3.43CUCh. 3 - Prob. 3.44CUCh. 3 - Prob. 3.45CUCh. 3 - Prob. 3.46CUCh. 3 - Prob. 3.47CUCh. 3 - Prob. 3.48CUCh. 3 - Prob. 3.49CUCh. 3 - Prob. 3.50CUCh. 3 - Prob. 3.51CUCh. 3 - Prob. 3.52CUCh. 3 - Prob. 3.1PCh. 3 - Prob. 3.2PCh. 3 - Prob. 3.3PCh. 3 - Prob. 3.4PCh. 3 - Prob. 3.5PCh. 3 - Prob. 3.6PCh. 3 - Prob. 3.7PCh. 3 - Prob. 3.8PCh. 3 - Prob. 3.9PCh. 3 - Prob. 3.10PCh. 3 - Prob. 3.11PCh. 3 - Prob. 3.12PCh. 3 - Prob. 3.13PCh. 3 - Prob. 3.14PCh. 3 - Prob. 3.15PCh. 3 - Prob. 3.16PCh. 3 - Prob. 3.17PCh. 3 - Prob. 3.18PCh. 3 - Prob. 3.19PCh. 3 - Prob. 3.20PCh. 3 - Prob. 3.21PCh. 3 - Prob. 3.22PCh. 3 - Prob. 3.23PCh. 3 - Prob. 3.24PCh. 3 - Prob. 3.25PCh. 3 - Prob. 3.26PCh. 3 - Prob. 3.27PCh. 3 - Prob. 3.28PCh. 3 - Prob. 3.29PCh. 3 - Prob. 3.30PCh. 3 - Prob. 3.31PCh. 3 - Prob. 3.32PCh. 3 - Prob. 3.33PCh. 3 - Prob. 3.34PCh. 3 - Prob. 3.35PCh. 3 - Prob. 3.36PCh. 3 - Prob. 3.37PCh. 3 - Prob. 3.38PCh. 3 - Prob. 3.39PCh. 3 - Prob. 3.40PCh. 3 - Prob. 3.41PCh. 3 - Prob. 3.42PCh. 3 - Prob. 3.43PCh. 3 - Prob. 3.44PCh. 3 - Prob. 3.45PCh. 3 - Prob. 3.46PCh. 3 - Prob. 3.47PCh. 3 - Prob. 3.48PCh. 3 - Prob. 3.49PCh. 3 - Prob. 3.50PCh. 3 - Prob. 3.51PCh. 3 - Prob. 3.52PCh. 3 - Prob. 3.53PCh. 3 - Prob. 3.54PCh. 3 - Prob. 3.55PCh. 3 - Prob. 3.56PCh. 3 - Prob. 3.57PCh. 3 - Prob. 3.58PCh. 3 - Prob. 3.59PCh. 3 - Prob. 3.60PCh. 3 - Prob. 3.61PCh. 3 - Prob. 3.62PCh. 3 - Prob. 3.63PCh. 3 - Prob. 3.64PCh. 3 - Prob. 3.65PCh. 3 - Prob. 3.66PCh. 3 - Prob. 3.67PCh. 3 - Prob. 3.68PCh. 3 - Prob. 3.69PCh. 3 - Prob. 3.70PCh. 3 - Prob. 3.71PCh. 3 - Prob. 3.72PCh. 3 - Prob. 3.73PCh. 3 - Prob. 3.74PCh. 3 - Prob. 3.75PCh. 3 - Prob. 3.76PCh. 3 - Prob. 3.77PCh. 3 - Prob. 3.78PCh. 3 - Prob. 3.79PCh. 3 - Prob. 3.80PCh. 3 - Prob. 3.81PCh. 3 - Prob. 3.82PCh. 3 - Prob. 3.83PCh. 3 - Prob. 3.84PCh. 3 - Prob. 3.85PCh. 3 - Prob. 3.86PCh. 3 - Prob. 3.87PCh. 3 - Prob. 3.88PCh. 3 - Prob. 3.89PCh. 3 - Prob. 3.90PCh. 3 - Prob. 3.91PCh. 3 - Prob. 3.92PCh. 3 - Prob. 3.93PCh. 3 - Prob. 3.94PCh. 3 - Prob. 3.95PCh. 3 - Prob. 3.96PCh. 3 - Prob. 3.97PCh. 3 - Prob. 3.98PCh. 3 - Prob. 3.99P
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- Air is compressed in a piston-cylinder assembly from p₁ = 25 lb/in², T₁ = 500°R, V₁ = 9 ft³ to a final volume of V₂ = 1 ft³ in a process described by pv¹.25 = 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 incorrect. Determine the work, in Btu. W12= i -658.845 Btuarrow_forwardA gas of 2 kg in a closed system undergoes three processes in series: Process 1-2: isochoric process from state 1 with p, = 1 bar, V, = 4 m³ to state 2, where p2 = 2 bar. Process 2-3: compression state 3 where V3 = 2 m³, during which the pressure-volume relation is ру 3 const. Process 3-4: Isobaric process to state 4, where V. = 1 m³. Determine the specific volume in state 4.arrow_forwardAmmonia, initially at 6 bar, 40°C undergoes a constant specific volume process to a final pressure of 2.75 bar.At the final state, determine the temperature, in °C, and the quality.arrow_forward
- Carbon dioxide contained in a piston-cylinder arrangement, initially at 6 bar and 400K, undergoes an expansion to a final temperature of 298 k, during which the pressure-volume relationship if pV^1.2 = constant.Assuming the ideal gas model for the CO2, determine the final pressure, in bar, and the work and heat transfer, each in kJ/kgarrow_forwardAir is compressed in a piston–cylinder assembly from p1 = 25 lbf/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.arrow_forward1. Show all work for each stepA piston-cylinder assembly contains 3 kg of water at 120oC and 1.5 bar. The water is compressed to liquid-vapor mixture state where the pressure is 4 bar, quality 80%. During the compression, there is a heat transfer of energy from the water to its surroundings having a magnitude of 350kJ. Neglecting changes in kinetic energy and potential energy, determine the work, in kJ, for the process of the water.(a) Locate the states on the T-v coordinate and process. ( Draw the graph for T-v) (b)Is this a closed system or an open system? (c)Write your energy balance equation (d)Determine the specific internal energy at state 1 (u1), in kJ/kg (e)Determine the specific internal energy at state 2(u2), in kJ/kg (f)Determine the work for the process, in kJ, and judge the direction of energy flow by the work (into the system or from the system)arrow_forward
- 1. Show all work for each stepA piston-cylinder assembly contains 3 kg of water at 120oC and 1.5 bar. The water is compressed to liquid-vapor mixture state where the pressure is 4 bar, quality 80%. During the compression, there is a heat transfer of energy from the water to its surroundings having a magnitude of 350kJ. Neglecting changes in kinetic energy and potential energy, determine the work, in kJ, for the process of the water.(a) Locate the states on the T-v coordinate and process. (b)Is this a closed system or an open system? (c)Write your energy balance equation (d)Determine the specific internal energy at state 1 (u1), in kJ/kg (e)Determine the specific internal energy at state 2(u2), in kJ/kg (f)Determine the work for the process, in kJ, and judge the direction of energy flow by the work (into the system or from the system)arrow_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_forwardA piston-cylinder assembly contains Refrigerant 22, initially a saturated vapor at 5 bar. The refrigerant undergoes a process for which the pressure-specific volume relationship is pv = constant to a final pressure of 20 bar. Kinetic and potential energy effects can be neglected. a. For your schematic, provide a rough sketch of your system, with arrows indicating direction of work and heat (i.e, in or out of the system) b. Determine the work and heat transfer for the process, each in (kJ/kg)arrow_forward
- Two kg of water is contained in a piston-cylinder assembly, initially at 10 bar and O °C. The water is slowly heated at constant pressure to a final state. If the heat ansfer for the process is 1740 kJ, determine the temperature at the final state, in °C, d the work, in kJ. Kinetic and potential energy effects are negligible. Hint: in this oblem, the transferred heat equals the enthalpy change.arrow_forwardCarbon dioxide (CO2) contained in a piston-cylinder arrangement, initially at 6 bar and 400 K, undergoes an expansion to a final temperature of 260 K, during which the pressure-volume relationship is pV1.25 = constant. Assuming the ideal gas model for the CO2, determine the final pressure, in bar, and the work and heat transfer, each in k.J/kg.arrow_forwardWater, initially saturated vapor at 3 bar, fills a closed, rigid container. The water is heated until its temperature is 360°C. For the water, determine the heat transfer, in kJ per kg of water. Kinetic and potential energy effects can be ignored. Q/m =_kJ/kgarrow_forward
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