Water is contained in a closed rigid tank at an initial pressure of 1200 kPa. Heat transfer occurs until the pressure increases to 7 MPa and the tank found to be containing 1,78 kg saturated liquid, and the mass of the saturated vapor is 0.22 kg. Determine the initial temperature, entropy and enthalpy of the water.

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Q: Determine

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Q: enthalpy

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A: Handwriting.jpg

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Q: water at 400 kPa

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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.