A liquid R-134a bottle has an internal volume of 0.0015 m3 . Initially it contains 0.55 kg of R-134a (saturated mixture) at 26°C. A valve is opened and R-134a vapor only (no liquid) is allowed to escape slowly such that temperature remains constant until the mass of R-134a remaining is 0.15 kg. Find the heat transfer with the surroundings that is needed to maintain the temperature and pressure of the R-134a constant.

Q: (a) the final temperature, (b) the work done during this process, (c) the total heat transfers

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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

Q: A vessel having a volume of 2m3 contains 0.02m3 of saturated liquid water and 1.98m3 of saturated…

A: given data  v total = 2m3 V2 = 0.02m3 Vg = 1.98m3 P =100 KPa     to find  1) ML in KG 2) mv in KG 3)…

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Q: erature is 32 ASSUMPTIC

A: Given: m= 5 kg  T1  =1500 C  T2 = 3200 C

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Q: A liquid R-134a bottle has an internal volume of 0.0018 m^3 initially, it contains 0.88 kg of R-134a…

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Q: When a system that use refrigerant-134a at temperature of 95 C at pressure of 1.4 kPa is cooled at…

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Q: A rigid tank of 0.1 m3 volume initially contains wet steam at 2 MPa and 35 % quality. Saturated…

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A: From the steam table, the specific enthalpy of the saturated water at 200C is 83.9199 kJ/kg. From…

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.