Fundamentals Of Engineering Thermodynamics, 9e
9th Edition
ISBN: 9781119391432
Author: MORAN
Publisher: WILEY
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Chapter 2, Problem 2.46CU
To determine
If the given statement about the net amount of energy transferred in a cycle is true or false.
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A closed system undergoes a thermodynamic cycle with three steps: process 1-2 (from state 1 to state 2), process 2-3 (from state 2 to state 3), process 3-1 (from state 3 to state 1).
During process 1-2, the system received energy by heat transfer of 5J and did work of 10J.
During process 2-3, the system was transferred energy from its surrounding by heat transfer of 25J and work was done on the system of 20J.
During process 3-1, the system discharged 40J to its surrounding by heat transfer. What is the net work in this cycle?
Enter the answer with the sign: + or - , but without units. For example, +27. Enter zero with no sign: 0.
A closed system undergoes a thermodynamic cycle with three steps: process 1-2 (from state 1 to state 2), process 2-3 (from state 2 to state 3), process 3-1 (from state 3 to state 1).
During process 1-2, the system received energy by heat transfer of 5J and did work of 10J.
During process 2-3, the system was transferred energy from its surrounding by heat transfer of 25J and work was done on the system of 20J.
During process 3-1, the system discharged 40J to its surrounding by heat transfer. What is the net work in this cycle?
A closed system undergoes a thermodynamic cycle with three steps: process 1-2 (from state 1 to state 2), process 2-3 (from state 2 to state 3), process 3-1 (from state 3 to state 1).
During process 1-2, the system received energy by heat transfer of 5J and did work of 10J.
During process 2-3, the system was transferred energy from its surrounding by heat transfer of 25J and work was done on the system of 20J.
During process 3-1, the system discharged 40J to its surrounding by heat transfer. What is work associated with process 3-1?
Chapter 2 Solutions
Fundamentals Of Engineering Thermodynamics, 9e
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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- A closed system undergoes a thermodynamic cycle with three steps: process 1-2 (from state 1 to state 2), process 2-3 (from state 2 to state 3), process 3-1 (from state 3 to state 1). During process 1-2, the system received energy by heat transfer of 5J and did work of 10J. During process 2-3, the system was transferred energy from its surrounding by heat transfer of 25J and work was done on the system of 20J. During process 3-1, the system discharged 40J to its surrounding by heat transfer. What are Qin and Qout in this cycle? Enter the answers separate by / and without units and spaces. For example, 27/13.arrow_forwardProve that internal energy is the property of the system.arrow_forwardAs shown in figure below, 5 kg of steam contained within a piston-cylinder assembly undergoes an expansion from state 1, where the specific internal energy is uj = 2709.9 kJ/kg, to state 2, where uz = 2659.6 kJ/kg. During the process, there is heat transfer to the steam with a magnitude of 80 kJ. Also, a paddle wheel transfers energy to the steam by work in the amount of 18.5 kJ. There is no significant change in the kinetic or potential energy of the steam. Determine the energy transfer by work from the steam to the piston during the process, in kJ. 5 kg of steamarrow_forward
- Steam in a piston-cylinder assembly undergoes a polytropic process, with n = 2, from an initial state where V1 = 2.63160 ft³, p1 = 400 Ib;/in?, and u1 = 1322.4 Btu/lb to a final state where u2 = 1036.0 Btu/lb and v2 = 3.393 ft/lb. The mass of the steam is 1.5 lb. Changes in kinetic and potential energy can be neglected. Determine the change in volume, in ft3, the energy transfer by work, in Btu, and the energy transfer by heat, in Btu.arrow_forwardAir expands adiabatically in a piston-cylinder assembly from an initial state where p₁ = 100 lbf/in.², v₁ = 3.704 ft3/lb, and T₁ = 1000 °R, to a final state where p2 = 70 lbf/in.² The process is polytropic with n = 1.4. The change in specific internal energy, in Btu/lb, can be expressed in terms of temperature change as Au = (0.171)(T2 - T1). Determine the final temperature, in °R. Kinetic and potential energy effects can be neglected. T₂ = i °Rarrow_forwardAn object whose mass is 330.693 lb experiences changes in its kinetic and potential energies owing to the action of a resultant force R. The work done on the object by the resultant force is 163 Btu. There are no other interactions between the object and its surroundings. If the object’s elevation increases by 90 ft and its final velocity is 150 ft/s, what is its initial velocity, in ft/s? Let g = 32.2 ft/s^2. Ans. V1 = 60.10 ft/sarrow_forward
- Steam in a piston-cylinder assembly undergoes a polytropic process, with n = 2, from an initial state where V₁ = 3.50880 ft³, p₁ = 400 Ibr/in2, and u₁ = 1322.4 Btu/lb to a final state where u₂ = 1036.0 Btu/lb and v₂ = 3.393 ft³/lb. The mass of the steam is 2.0 lb. Changes in kinetic and potential energy can be neglected. Determine the change in volume, in ft3, the energy transfer by work, in Btu, and the energy transfer by heat, in Btu. Step 1 Determine the change in volume, in ft³. ΔV= i ft3arrow_forwardA closed system loses energy by heat transfer at the rate of 10KJ/s. If the system operates at steady state, calculate power in this process.arrow_forwardA gas in a piston–cylinder assembly undergoes a compression process for which the relation between pressure and volume is given by pVn = constant. The initial volume is 0.2 m3, the final volume is 0.04 m3, and the final pressure is 2 bar.For n = 1.4, determine the initial pressure, in bar, and the work for the process, in kJ.arrow_forward
- Five kg of steam is contained within a piston- cylinder assembly. It undergoes an expansion from state 1, where the specific internal energy is u_1=2709.9 kJ/kg to state 2, where u_2=2659.6 kJ/kg. During the process, heat is transferred to the steam with a magnitude of 80 kJ. Also, a paddle Ww=-18.5 kJ wheel transfers energy to the steam by work in the amount of 18.5 kJ. There is no significant change in the kinetic or potential energy of the steam. Determine the energy transfer by work from the steam to the piston during the process, in kJ. Indicate whether the work is done on or done by the system. Q=+80 kJ 5 kg of steam W u₁ = 2709.9 kJ/kg U₂ = 2659.6 kJ/kg piston =?arrow_forwardThe net change in volume (a property) during a cycle is always zero.arrow_forwardA gas in a piston-cylinder assembly undergoes a compression process for which the relation between pressure and volume is given by pn = constant. The initial volume is 0.1 m, the final volume is 0.04 m3, and the final pressure is 2 bar. For n = 1.2, determine the initial pressure, in bar, and the work for the process, in kJ.arrow_forward
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