(a) A piston-cylinder device (2 m) initially contains water at 300 kPa with 60% quality.Heat is transferred to the water at constant pressure until the volume of the piston-cylinder is triples.(i)Determine the enthalpy change of this process (kJ/kg).(ii) Sketch the process in a T-v diagram with respect to the saturation lines.(b) Arigid tank is divided into two parts by a partition. One side of the tank contains 2 kg ofideal gas at 627°C and 300 kPa. The other side of the tank is evacuated and the volumeis one-half the size of the part containing the ideal gas. The gas expands to fill the entiretank when the partition is removed. Heat is supply to the gas until the temperatureincreased to 1500°C. Calculate the final pressure of the gas (kPa).

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(a) A piston-cylinder device (2 m) initially contains water at 300 kPa with 60% quality. Heat is transferred to the water at constant pressure until the volume of the piston- cylinder is triples. 6) Determine the enthalpy change of this process (kJ/kg). (ii) Sketch the process in a T-v diagram with respect to the saturation lines.

(a) A piston-cylinder device (2 m) initially contains water at 300 kPa with 60% quality. Heat is transferred to the water at constant pressure until the volume of the piston- cylinder is triples. 6) Determine the enthalpy change of this process (kJ/kg). (ii) Sketch the process in a T-v diagram with respect to the saturation lines.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

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.

Question

(a) A piston-cylinder device (2 m) initially contains water at 300 kPa with 60% quality.
Heat is transferred to the water at constant pressure until the volume of the piston-
cylinder is triples.
(i)
Determine the enthalpy change of this process (kJ/kg).
(ii) Sketch the process in a T-v diagram with respect to the saturation lines.
(b) Arigid tank is divided into two parts by a partition. One side of the tank contains 2 kg of
ideal gas at 627°C and 300 kPa. The other side of the tank is evacuated and the volume
is one-half the size of the part containing the ideal gas. The gas expands to fill the entire
tank when the partition is removed. Heat is supply to the gas until the temperature
increased to 1500°C. Calculate the final pressure of the gas (kPa).

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