Liquid water at 200 kPa and 15C is heated in a chamber by mixing it with superheated steam at 200 kPa and 150C. Liquid water enters the mixing chamber at a rate of 4.3 kg/s, and the chamber is estimated to lose heat to the surrounding air at 20C at a rate of 1200 kJ/min. If the mixture leaves the mixing chamber at 200 kPa and 80C, determine (a) the mass flow rate of the superheated steam and (b) the rate of entropy generation during this mixing process.
Energy transfer
The flow of energy from one region to another region is referred to as energy transfer. Since energy is quantitative; it must be transferred to a body or a material to work or to heat the system.
Molar Specific Heat
Heat capacity is the amount of heat energy absorbed or released by a chemical substance per the change in temperature of that substance. The change in heat is also called enthalpy. The SI unit of heat capacity is Joules per Kelvin, which is (J K-1)
Thermal Properties of Matter
Thermal energy is described as one of the form of heat energy which flows from one body of higher temperature to the other with the lower temperature when these two bodies are placed in contact to each other. Heat is described as the form of energy which is transferred between the two systems or in between the systems and their surrounding by the virtue of difference in temperature. Calorimetry is that branch of science which helps in measuring the changes which are taking place in the heat energy of a given body.
Liquid water at 200 kPa and 15C is heated in a
chamber by mixing it with superheated steam at 200 kPa
and 150C. Liquid water enters the mixing chamber at a rate
of 4.3 kg/s, and the chamber is estimated to lose heat to
the surrounding air at 20C at a rate of 1200 kJ/min. If the
mixture leaves the mixing chamber at 200 kPa and 80C,
determine (a) the mass flow rate of the superheated steam
and (b) the rate of entropy generation during this mixing
process.
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