What is the minimum amount of Work required to compress 1 kg of H2O isothermally from...
What is the minimum amount of Work required to compress 1 kg of H2O isothermally from an initial state of 1 bar and 120 C to a final volume equal to one=third of the initial volume? (Assume none of the H2O is allowed to escape its confinement during the process)
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What is the minimum amount of Work required to compress 1 kg of
H2O isothermally from...
(30 points) A compressor uses 2200 kW of work to compress 2.50 kg/s of steam from...
(30 points) A compressor uses 2200 kW of work to compress 2.50 kg/s of steam from an initial state of 1.00 bar and 150.0°C to a final pressure of 15.0 bar. Determine the compressor efficiency.
Calculate the real work (in kJ) to compress 1 mol of n-butane from 1.0 bar to...
Calculate the real work (in kJ) to compress 1 mol of n-butane from 1.0 bar to 15 bar isothermally at 125oC and compare to the ideal gas equation of state.
An ideal gas is allowed to expand isothermally until it reaches its final volume. It is...
An ideal gas is allowed to expand isothermally until it reaches its final volume. It is then heated at constant volume until it reaches its final pressure. The initial state of the gas is P1 = 2.93 atm, V1 = 1.00 L, and Eint 1 = 414 J, and its final state has volume V2 = 2.93 L and Eint 2 = 951 J. 1) Calculate the work done by the gas. Be careful with signs: if the work you...
5. Air expands isothermally constant temperature) in a closed, piston-cylinder device. The original state is given...
5. Air expands isothermally constant temperature) in a closed, piston-cylinder device. The original state is given by pı = 20 MPa, T = 1000 K. the process continues until the pressure drops to 2 MPa. The original volume of the air is V1 = 1 m². Determine the following: a. the mass of the air in the system, in kg. b. the final density of the air, in kg/m". Remember, Rair = 0.287 kJ/kg-K c. the final volume of the...
105Pa, initial temperature T-300K, and an initial 1. An ideal gas with initial pressure 2 volume V - 1m3 expands isothermally to a final volume of 2m3. Then, the gas returns to its initial state, fir...
105Pa, initial temperature T-300K, and an initial 1. An ideal gas with initial pressure 2 volume V - 1m3 expands isothermally to a final volume of 2m3. Then, the gas returns to its initial state, first by constant pressure (isobaric) contraction, and then by a change at constant volume (isochoric) a) Draw a PV diagram of this process. What's the total change in thermal energy of the entire process? b) What's the work done by the environment on the gas?...
Air, initially at the dead state, is compressed isothermally and with no friction inside a piston...
Air, initially at the dead state, is compressed isothermally and with no friction inside a piston cylinder device until it reaches 1/10 of its original volume. a) What is the change of the energy of the air due to this process? (10 pts) b) What is the change of exergy of air due to this process? Briefly comment on the difference (or lack of difference) between the findings in part(a) and part (b). (15 pts) c) What is the amount...
1.Water vapor contained in a piston–cylinder assembly undergoes an isothermal expansion at 277°C from a pressure...
1.Water vapor contained in a piston–cylinder assembly undergoes an isothermal expansion at 277°C from a pressure of 5.1 bar to a pressure of 2.7 bar. Evaluate the work, in kJ/kg. 2.Nitrogen (N2) contained in a piston–cylinder arrangement, initially at 9.3 bar and 437 K, undergoes an expansion to a final temperature of 300 K, during which the pressure–volume relationship is pV1.1 = constant. Assuming the ideal gas model for the N2, determine the heat transfer in kJ/kg. 3.Argon contained in...
Thermodynamics Compare the compressor work input required to compress water isentropically from 100 kPa to 1...
Thermodynamics
Compare the compressor work input required to compress water isentropically from 100 kPa to 1 MPa, assuming that the water exists as (a) saturated liquid and (b) saturated vapor at the inlet state.
Part II Work out the problems-clearly indicating/labeling final results for each part, show to be considered...
Part II Work out the problems-clearly indicating/labeling final results for each part, show to be considered for partial credit. Point values are shown in parenthesis. 8 final results for each part. Show all your work 1. (15) A horizontal piston-cylinder assembly contains water. The piston is connected to a shaft, which (15) A horie can apply different forces to the piston as the water is expanded or compressed. Initially, the apparatus contains a saturated liquid-vapor mixture of water at 0.9...
5. For liquid water, the isothermal compressibility is given by: V(P +b) Where c and b...
5. For liquid water, the isothermal compressibility is given by: V(P +b) Where c and b are functions of temperature only. If 1 kg of water is compressed isothermally and reversibly from 1 to 500 bar at 60'C, how much work is required? At 60°C, b 2700 bar and c0.125 cm3/g. (NOTE: density of water 1 g/cm3, ln(yl) pTrT)-K(PrP,). Answer the question in the steps indicated.) 120 points] What is the initial volume of water? [5 points] a. What is...
(30 points) A compressor uses 2200 kW of work to compress 2.50 kg/s of steam from an initial state of 1.00 bar and 150.0°C to a final pressure of 15.0 bar. Determine the compressor efficiency.
An ideal gas is allowed to expand isothermally until it reaches its final volume. It is then heated at constant volume until it reaches its final pressure. The initial state of the gas is P1 = 2.93 atm, V1 = 1.00 L, and Eint 1 = 414 J, and its final state has volume V2 = 2.93 L and Eint 2 = 951 J. 1) Calculate the work done by the gas. Be careful with signs: if the work you...
5. Air expands isothermally constant temperature) in a closed, piston-cylinder device. The original state is given by pı = 20 MPa, T = 1000 K. the process continues until the pressure drops to 2 MPa. The original volume of the air is V1 = 1 m². Determine the following: a. the mass of the air in the system, in kg. b. the final density of the air, in kg/m". Remember, Rair = 0.287 kJ/kg-K c. the final volume of the...
105Pa, initial temperature T-300K, and an initial 1. An ideal gas with initial pressure 2 volume V - 1m3 expands isothermally to a final volume of 2m3. Then, the gas returns to its initial state, first by constant pressure (isobaric) contraction, and then by a change at constant volume (isochoric) a) Draw a PV diagram of this process. What's the total change in thermal energy of the entire process? b) What's the work done by the environment on the gas?...
Air, initially at the dead state, is compressed isothermally and with no friction inside a piston cylinder device until it reaches 1/10 of its original volume. a) What is the change of the energy of the air due to this process? (10 pts) b) What is the change of exergy of air due to this process? Briefly comment on the difference (or lack of difference) between the findings in part(a) and part (b). (15 pts) c) What is the amount...
Thermodynamics
Compare the compressor work input required to compress water isentropically from 100 kPa to 1 MPa, assuming that the water exists as (a) saturated liquid and (b) saturated vapor at the inlet state.
Part II Work out the problems-clearly indicating/labeling final results for each part, show to be considered for partial credit. Point values are shown in parenthesis. 8 final results for each part. Show all your work 1. (15) A horizontal piston-cylinder assembly contains water. The piston is connected to a shaft, which (15) A horie can apply different forces to the piston as the water is expanded or compressed. Initially, the apparatus contains a saturated liquid-vapor mixture of water at 0.9...
5. For liquid water, the isothermal compressibility is given by: V(P +b) Where c and b are functions of temperature only. If 1 kg of water is compressed isothermally and reversibly from 1 to 500 bar at 60'C, how much work is required? At 60°C, b 2700 bar and c0.125 cm3/g. (NOTE: density of water 1 g/cm3, ln(yl) pTrT)-K(PrP,). Answer the question in the steps indicated.) 120 points] What is the initial volume of water? [5 points] a. What is...
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