uring a polytropic process, 10 lb of an ideal gas, whose R = 40 ft.lb/lb.R and cp = 0.25 Btu/lb.R, changes state from 20 psia and 40°F to 120 psia and 340°F. Determine (a)n, (b) U and H, (c) S, (d)Q, (e)∫ , (f)- ∫...... (g)If the process is steady flow during which K = 0, what is Ws?. What is K if Ws = 0? (h)What is the work for a nonflow process?

Q: 2.4kg of water vapor is cooled in a closed, rigid tank from T = 440 °C and Р = 100 bar to a final…

A: Givenm=4kginitial state T1=440oCP1=100 barfinal stateT2=320oC

Q: Determine the work and heat transfer, in Btu.

A:

Q: Carbon dioxide (CO₂) fills a closed, rigid tank fitted with a paddle wheel, initially at 80°F, 30…

A:

Q: Carbon dioxide (CO₂) fills a closed, rigid tank fitted with a paddle wheel, initially at 80°F, 50…

A:

Q: A divider separates 1 lb mass of carbon monoxide (CO) from a thermal reservoir at 150o F. the carbon…

A: Part(a).For CO:

Q: Air within a piston-cylinder assembly, initially at 50 lbf/ in.2, 510°R, and a volume of 6 ft3, is…

A: Given data: P1=50 lbf/in2=7200 lb/ft2T1=510°RV1=6 ft3V2=3 ft3k=1.4 To fing: the mass, in lb, final…

Q: A piston-cylinder assembly contains 0.4 lb of air initially at a pressure of 30 lb/in² and a…

A: Given that: m = mass of air inside the cylinder = 0.4 lb P1 = 30 lbf/in2 T1 = 200 oF k = specific…

Q: Water, initially saturated vapor at 5 bar, fills a closed, rigid container. The water is heated…

A: The heat transfer. Given: The initial pressure of the vapor is P1=5 bar. The final temperature is…

Q: Two lbs of water vapor in a piston-cylinder assembly expands at a constant pressure of 250 lbf/in²…

A: Givenm=2lbsP=250lbf/in2  at saturated vapourV=7.08 ft3

Q: Calculate the total work done (in J) by 2.14 mol of an ideal gas with a pressure of 5.10 MPa and a…

A:

Q: A piston-cylinder assembly contains 0.6 lb of air initially at a pressure of 30 lbf/in² and a…

A: According to the given data P1=P2=30lb/in2=30x144=4320 lb/ft2 m=0.6lb T1=300°F =300+460=760°R k=1.4…

Q: Ammonia contained in a piston–cylinder assembly, initially saturated vapor at T1 = 6°F, undergoes an…

A: Introduction: The isothermal process is classified into two categories. one isothermal expansion…

Q: Refrigerant R-134a contained within a piston-cylinder device undergoes isobaric heating processes…

A:

Q: Air within a piston-cylinder assembly, initially at 50 lbf/ in.?, 510°R, and a volume of 6 ft³, is…

A:

Q: A closed, rigid tank is filled with water. Initially, the tank holds 0.8 lb of saturated vapor and…

A: The mass of saturated vapor is mv=0.8 lb The mass of saturated liquid is ml=5 lb. The initial…

Q: Ammonia contained in a piston-cylinder assembly, initially saturated vapor at 0°F, undergoes an…

A:

Q: A closed, rigid tank is filled with 0.02 lb of water, initially at 120°F and a quality of 50%. The…

A: As the tank is rigid, the specific volume remains the same.

Q: Five kg of water is contained in a piston–cylinder assembly, initially at 5 bar and 300°C. The water…

A: Given data  Mass = 5 kg Water at 5 bar and 300°C heated at constant pressure . Heat transfer =…

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.