3.75 Three lb of water is contained in a piston-cylinder assembly, initially occupying a volume V₁ = 30 ft³ at T₁ = 300°F. The water undergoes two processes in series: Process 1-2: Constant-temperature compression to V₂ = 11.19 ft³, during which there is an energy transfer by heat from the water of 1275 Btu. Process 2-3: Constant-volume heating to p3= 120 lbf/in.² Sketch the two processes in series on a T-v diagram. Neglecting kinetic and potential energy effects, determine the work in Process 1-2 and the heat transfer in Process 2-3, each in Btu.

3.75 Three lb of water is contained in a piston-cylinder assembly, initially occupying a volume V₁ = 30 ft³ at T₁ = 300°F. The water undergoes two processes in series: Process 1-2: Constant-temperature compression to V₂ = 11.19 ft³, during which there is an energy transfer by heat from the water of 1275 Btu. Process 2-3: Constant-volume heating to p3= 120 lbf/in.² Sketch the two processes in series on a T-v diagram. Neglecting kinetic and potential energy effects, determine the work in Process 1-2 and the heat transfer in Process 2-3, each in Btu.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

Water at 320C and 20bar undergoes a process within a rigid tank to a final pressure of 30bar. Determine the following. a. If the final state is superheated, report the temperature. If the final state is two phase, report the quality. b. Determine the heat transfer for the process (kJ/kg)
3.24
A fixed-mass system contains mass, m = 1.0 kg of air. A thermodynamic process occurs from state one to state two, where T₁ = 300 °K, P₁ = 100 kPa; T₂ = 2700 °K, P₂ = 204.9953251 kPa. Determine S₂ - S₁ = m (S₂-S₁) in kJ / °K. Note: You are required to assume constant specific heats in this problem, with Cpo = 1.004 kJ/(°K * kg); for air, the gas constant is R = 0.287 kJ/(°K * kg).
Saturated water vapor initially at a pressure of 225 kPa and volume 0.01 is contained in a piston cylinder assembly. The water undergoes two processes in series:Process 1-2: Constant volume process till the pressure is 2 bars.Process 2-3 : Constant pressure process till the volume is doubled.Determine:a) the temperature at state 3b) the total amount of work for process 1-3c) the total amount of heat transfer for process 1-3. v1 (m3/kg) Format : 0.72765 m (kg) Format : 0.0622 v3 (m3/kg) Format : 7.8553 W2-3 (kJ) Format : 5.7285 u1 (kJ/kg) Format : 2832.5 u2 (kJ/kg) Format : 7592.79 Q1-2 (kJ) Format : -4.87 u3 (kJ/kg) Format : 8499.67 Q2-3 (kJ) Format : 60.34 Q1-3 (kJ) Format : 5.9 T3 (oC) Format : 822.09
20 g of air undergoes a closed cycle, illustrated in Figure Q2, which consists of the following 3 processes: 1-2 Constant pressure heat rejection. 2-3 Constant volume heat addition. 3-1 Isothermal expansion back to the original conditions. P (kPa) 75 1 V (m') 0.025 0.04 Figure Q2: Three process cycle Given that Rair = 287 J/kg-K, and Cy = 718 J/kg-K, and assuming ideal gas conditions throughout: (a) Determine the temperatures at points 1, 2 and 3, and the pressure at point 3. (b) Determine the work during each process, and the net work from the cycle. (c) Determine the heat transferred during each process. (d) Verify that this is a cycle.
A piston-cylinder assembly contains a mystery substance that undergoes a series of processes. Process 1-->2: Constant pressure process at 5bar from v1=.07m3/kg to v2=.12m3/kg Process 2->3: Constant volume process to saturated vapor Process 3->4: Constant temperature process to quality of 50% Process 4->5: Constant volume process to 5bar Sketch the processes on Pt, Pv, and Tv, plots. Lable the axes including property values; use closed dots to show the states, use solid lines to connect the states, add number and arrows to make clear the states numbers and process directions. Could this be considered a thermodynamic cycle? Why or why not?
3.26 Determine the quality (if saturated) or temperature substances at the given two states: a. Water at b. Nitrogen at c. Ammonia at d. R-22 at 1: 120°C, 1 m³/kg; 1: 1 MPa, 0.03 m³/kg; 1: 400 kPa, 0.327 m³/kg; 1: 130 kPa, 0.1 m³/kg; (if superheated) of the following 2: 10 MPa, 0.01 m³/kg 2: 100 K, 0.03 m³/kg 2: 1000 kPa, 0.1 m³/kg 2: 150 kPa, 0.17 m³/kg
3 One kilogram of an ideal gas at 5.5 bar with an initial volume of 0.3 m expands to a final volume of 0.5 m in accordance with the equation = C. Find the work done during the process. Take R = 0.287 kJ/kg-K and C, = 0.713 kJ/kg-K. pV
Q2: A turbine operating under steady flow conditions receives steam at the following state: pressure 15 bar ; specific volume 0.15 m/kg ; internal energy 2600 kJ/kg; velocity 30 m/s. The state of the steam leaving the turbine is : pressure 0.4 bar; specific volume 5 m'/kg; internal energy 2200 kJ/kg; velocity 100 m/s. Heat is lost to the surroundings at the rate of 0.2 kJ/s. If the rate of steam flow is 0.5 kg/s, what is the power developed by the turbine?