1-ft³ of air is contained in a spring-loaded piston-cylinder device. The spring constant is 6lbf/in, and thepiston diameter is 12 in. When no force is exerted by the spring on the piston, the state of the air is 250 psiaand 450°F. This device is now cooled until the volume is one-third its original size. Determine the changein the specific internal energy and enthalpy of the air.

Answered: Image /qna-images/answer/ec295056-84f5-4678-8dc7-6bdc4bb0aaf4.jpg

Answered: 1-ft³ of air is contained in a…

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

The molar specific heat at constant volume of an ideal gas is equal to 2.5 times the universal gas constant (8.314 J/mol K) .When the temperature increases by 100 K ,find out the change in molar specific enthalpy.
The storage tank of the steam system contains 0.005 kg of steam at a pressure of 50 bar and 500°C. When the system is shut down, the steam in the vessel is cooled to a constant volume until the pressure reaches 20 bar. Determine the degree of dryness fraction after cooling. The temperature of the steam after cooling, the specific internal energy after cooling, and the heat transfer that has occurred (in J).
A rigid tank with a volume of 0.1 m 3 contains water at 1.6 MPa and 300 °C. The tank is heated but, in order to maintain the pressure of the tank constant, a valve allows steam to leave the tank at an average temperature and pressure of 400 °C and 1.6 MPa, respectively. Determine the amount of heat transferred by the time the water has reached a temperature of 500 °C.
The air in an automobile tire with a volume of 1.23 ft3 is at 72°F and 0.5 bar. Determine the amount of air that must be added to raise the pressure to the recommended value of 1 bar Assume the atmospheric to be 14.7 psia and the temperature and the volume to remain constant.
A piston-cylinder assembly with a total volume of 0.1546m3contains 1 kg of water at 350°C.The apparatus was cooled to a temperature of 100 °C.Calculate the final pressure of the water in kPa and its volume in m3.
An Insulated rigid tank containing 0.25 m3 of air at 50 oC and 1.5 Bar. If a paddle wheel with a power rating of 50 W is operated inside the tank for 5 minutes. Determine the final temperature of air inside the tank. Determine The final pressure of Air inside the tank
A piston-cylinder arrangement contains water at 110°C, 85% quality with a volume of 1 L. What is the initial mass, in grams? The system is heated, causing the 150-mm-diameter piston to rise and encounter a linear spring with k = 800 kN/m. Calculate the specific internal energy (kJ/kg) at this instant knowing that the measured volume is 1.65 L. The heating continues and compresses the spring in the process. When the piston encounters the stops, the pressure is 200 kPa. What is the temperature (in °C) and entropy (in J/K) at this point? Heating continues until the pressure reached 300 kPa. What is the volume, in L at this instant? Illustrate the process in separate P-v and T-v diagram. Note:1000 L = 1m3. Hint: Draw the FBD of the piston in each state.
The air in an automobile tire with a volume of 2.60 ft3 is at 70°F and 22 psig. Determine the amount of air that must be added to raise the pressure to the recommended value of 30 psig. Assume the atmospheric pressure to be 14.6 psia and the temperature and the volume to remain constant. The gas constant of air is Ru 53.34 = 0.3704 The amount of air that must be added to raise the pressure is ft·lbf lbm-R 1 psia 144 lbf/ft² lbm. psia-ft³ lbm-R
The gauge pressure of a car tire is measured as 125 kPa before a trip, and 189 kPa after the trip, at a location where the atmospheric pressure is 95 kPa. Assuming that the volume of the tire remains constant and the air temperature before the trip is 101.3 ° C, determine the temperature of the air in the tire after the trip.
Determine the specific volume, internal energy and enthalpy of compressed liquid at 120 °C and 15MPa.
In a piston-cylinder setup, 2 kg of water undergoes a constant temperature expansion at T=200°C from a volume of V1 = 0.196 m³ to a pressure of p2 = 1 bar . We want to know what the work performed and heat transferred is during this process. If the heat transfer during the expansion process is Q1-2 = 3000 kJ, what is the work done? (Report your answers in kJ)
THERMOFLUID A frictionless piston-cylinder contains 3.30 kg of saturated water at 1 MPa. The water is expanded at constant pressure until its temperature rises to 270 °C. The image of the system and process are shown in Figure 3. Determine: The final volume of water in cylinder, and sketch the process in P-V diagram

SEE MORE QUESTIONS

Recommended textbooks for you

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Control Systems Engineering

Mechanical Engineering

ISBN:

9781118170519

Author:

Norman S. Nise

Publisher:

WILEY

Mechanics of Materials (MindTap Course List)

Mechanical Engineering

ISBN:

9781337093347

Author:

Barry J. Goodno, James M. Gere

Publisher:

Cengage Learning

Engineering Mechanics: Statics

Mechanical Engineering

ISBN:

9781118807330

Author:

James L. Meriam, L. G. Kraige, J. N. Bolton

Publisher:

WILEY

SEE MORE TEXTBOOKS