3–37E A spring-loaded piston-cylinder device is initially filled with 0.2 Ibm of an R-134a liquid-vapor mixture whose temperature is – 30°F and whose quality is 80 percent. The spring constant in the spring force relation F = kx is 37 lbf/in, and the piston diameter is 12 in. The R-134a undergoes a process that increases its volume by 40 percent. Calculate the final temperature and enthalpy of the R-134a. Answers: 81.5°F, 120 Btu/lbm %3D

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A: Given:R-410aT=210°CP1=100 kPaT2=50°C

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Q: Shown in the figure, an insulated rigid tank is divided into two equal parts by a partition.…

A: Giveninsulated tankm=4kgP1=600kPaT1=300KR=0.287 kJ/kgKCv=0.7180 kJ/kgK∆U=mCvT2-T1

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Q: 4-65E A 10 ft³ tank contains oxygen initially at 14.7 psia and 80°F. A paddle wheel within the tank…

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A: The given information in the problem is represented in the following attached image:

Q: 4-31E A 20 ft³ rigid tank initially contains saturated refrigerant-134a vapor at 160 psia. As a…

A: Properties of the refrigerant R134a at 160 psia:Properties of the refrigerant R134a at 50 psia:

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.