PRINT COMPANION ENGINEER THERMO
9th Edition
ISBN: 9781119778011
Author: MORAN
Publisher: WILEY
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Chapter 2, Problem 2.20P
(a)
To determine
The value of pressure at state 2 in bar for the nitrogen gas within a piston-cylinder assembly.
(b)
To determine
The work in the given process in kJ for the nitrogen gas within a piston-cylinder assembly.
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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
Determine the work, in Btu.
W12=
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Btu
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A 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.
Q2/(A): what are the various types of open system ?
B A particular substance undergoes a mechanically reversible process
expanding from an initiat state of 20 bar to a final state of 8 bar. The path for
the process is described by the equation:
0.036
Where P is in bar and v is in m. ifAu for the
P=
change of state is ( - 1400 I), Determine w, Q and AH?
Chapter 2 Solutions
PRINT COMPANION ENGINEER THERMO
Ch. 2 - Prob. 2.1ECh. 2 - Prob. 2.2ECh. 2 - Prob. 2.3ECh. 2 - Prob. 2.4ECh. 2 - Prob. 2.5ECh. 2 - Prob. 2.6ECh. 2 - Prob. 2.7ECh. 2 - Prob. 2.8ECh. 2 - Prob. 2.9ECh. 2 - Prob. 2.10E
Ch. 2 - Prob. 2.11ECh. 2 - Prob. 2.12ECh. 2 - Prob. 2.13ECh. 2 - Prob. 2.14ECh. 2 - Prob. 2.15ECh. 2 - Prob. 2.16ECh. 2 - Prob. 2.17ECh. 2 - Prob. 2.1CUCh. 2 - Prob. 2.2CUCh. 2 - Prob. 2.3CUCh. 2 - Prob. 2.4CUCh. 2 - Prob. 2.5CUCh. 2 - Prob. 2.6CUCh. 2 - Prob. 2.7CUCh. 2 - Prob. 2.8CUCh. 2 - Prob. 2.9CUCh. 2 - Prob. 2.10CUCh. 2 - Prob. 2.11CUCh. 2 - Prob. 2.12CUCh. 2 - Prob. 2.13CUCh. 2 - Prob. 2.14CUCh. 2 - Prob. 2.15CUCh. 2 - Prob. 2.16CUCh. 2 - Prob. 2.17CUCh. 2 - Prob. 2.18CUCh. 2 - Prob. 2.19CUCh. 2 - Prob. 2.20CUCh. 2 - Prob. 2.21CUCh. 2 - Prob. 2.22CUCh. 2 - Prob. 2.23CUCh. 2 - Prob. 2.24CUCh. 2 - Prob. 2.25CUCh. 2 - Prob. 2.26CUCh. 2 - Prob. 2.27CUCh. 2 - Prob. 2.28CUCh. 2 - Prob. 2.29CUCh. 2 - Prob. 2.30CUCh. 2 - Prob. 2.31CUCh. 2 - Prob. 2.32CUCh. 2 - Prob. 2.33CUCh. 2 - Prob. 2.34CUCh. 2 - Prob. 2.35CUCh. 2 - Prob. 2.36CUCh. 2 - Prob. 2.37CUCh. 2 - Prob. 2.38CUCh. 2 - Prob. 2.39CUCh. 2 - Prob. 2.40CUCh. 2 - Prob. 2.41CUCh. 2 - Prob. 2.42CUCh. 2 - Prob. 2.43CUCh. 2 - Prob. 2.44CUCh. 2 - Prob. 2.45CUCh. 2 - Prob. 2.46CUCh. 2 - Prob. 2.47CUCh. 2 - Prob. 2.48CUCh. 2 - Prob. 2.49CUCh. 2 - Prob. 2.50CUCh. 2 - Prob. 2.51CUCh. 2 - Prob. 2.52CUCh. 2 - Prob. 2.53CUCh. 2 - Prob. 2.54CUCh. 2 - Prob. 2.1PCh. 2 - Prob. 2.2PCh. 2 - Prob. 2.3PCh. 2 - Prob. 2.4PCh. 2 - Prob. 2.5PCh. 2 - Prob. 2.6PCh. 2 - Prob. 2.7PCh. 2 - Prob. 2.8PCh. 2 - Prob. 2.9PCh. 2 - Prob. 2.10PCh. 2 - Prob. 2.11PCh. 2 - Prob. 2.12PCh. 2 - Prob. 2.13PCh. 2 - Prob. 2.14PCh. 2 - Prob. 2.15PCh. 2 - Prob. 2.16PCh. 2 - Prob. 2.17PCh. 2 - Prob. 2.18PCh. 2 - Prob. 2.19PCh. 2 - Prob. 2.20PCh. 2 - Prob. 2.21PCh. 2 - Prob. 2.22PCh. 2 - Prob. 2.23PCh. 2 - Prob. 2.24PCh. 2 - Prob. 2.25PCh. 2 - Prob. 2.26PCh. 2 - Prob. 2.27PCh. 2 - Prob. 2.28PCh. 2 - Prob. 2.29PCh. 2 - Prob. 2.30PCh. 2 - Prob. 2.31PCh. 2 - Prob. 2.32PCh. 2 - Prob. 2.33PCh. 2 - Prob. 2.34PCh. 2 - Prob. 2.35PCh. 2 - Prob. 2.36PCh. 2 - Prob. 2.37PCh. 2 - Prob. 2.38PCh. 2 - Prob. 2.39PCh. 2 - Prob. 2.40PCh. 2 - Prob. 2.41PCh. 2 - Prob. 2.42PCh. 2 - Prob. 2.43PCh. 2 - Prob. 2.44PCh. 2 - Prob. 2.45PCh. 2 - Prob. 2.46PCh. 2 - Prob. 2.47PCh. 2 - Prob. 2.48PCh. 2 - Prob. 2.49PCh. 2 - Prob. 2.50PCh. 2 - Prob. 2.51PCh. 2 - Prob. 2.52PCh. 2 - Prob. 2.53PCh. 2 - Prob. 2.54PCh. 2 - Prob. 2.55PCh. 2 - Prob. 2.56PCh. 2 - Prob. 2.57PCh. 2 - Prob. 2.58PCh. 2 - Prob. 2.59PCh. 2 - Prob. 2.60PCh. 2 - Prob. 2.62PCh. 2 - Prob. 2.63PCh. 2 - Prob. 2.64PCh. 2 - Prob. 2.65PCh. 2 - Prob. 2.66PCh. 2 - Prob. 2.67PCh. 2 - Prob. 2.68PCh. 2 - Prob. 2.69PCh. 2 - Prob. 2.70PCh. 2 - Prob. 2.71P
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- 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 usedarrow_forwardAir 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_forwardNitrogen (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?arrow_forward
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- 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_forward3.14 WP SS Ammonia, initially at 6 bar, 40ºC undergoes a constant-specific volume process to a final pressure of 3 bar. At the final state, determine the temperature, in °C, and the quality. Locate each state on a sketch of the T-v diagram.arrow_forwardTwo 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_forward
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