Since the heating occurs at constant Pressure, we use the specific heat value under constant pressure:
Cp of steam = 1.873 KJ / kg-K
Heat needed = mass * Cp * temperature change = 12 * 1.873 * (350 - 200) = 3371.4 KJ
12 kg of steam, initially at 15 bar pressure and 200°C, is contained in a piston-cylinder...
Five kg of water is contained in a piston–cylinder assembly, initially at 5 bar and 200°C. The water is slowly heated at constant pressure to a final state. The heat transfer for the process is 3260 kJ and kinetic and potential energy effects are negligible. Determine the final volume, in m3, and the work for the process, in kJ.
A vertical piston-cylinder contains 0.2 kg of steam initially at an absolute pressure of 200 kPa and a temperature of 300°C. The area of the piston is 10 cm2, and the weight of the piston is 100 N. The piston cylinder is then laid on its side, and the piston is free to move. When the piston reaches its final position, the temperature has decreased to 200°C. Find The initial volume of the steam in the piston-cylinder, The final pressure...
A piston –cylinder device initially contains 0.2 kg of steam at 1400 kPa and 350C. The steam is then cooled at constant pressure until it is at 200C. (a) Determine the volume change of the cylinder during this process using the compressibility factor. (b) Compare the result in part (a) to that obtained using actual property values.
1. A piston-cylinder device contains steam initially at 1.2 MPa, 500°C, and 2.8 m' Steam is al to cool at constant pressure until it first starts condensing (a) Show the process on a saturation lines and determine (b) the mass of the steam, (e) the final diagrams with respect to temperature, and (d) the amount of heat and work transfer (25 marks)
1. A piston-cylinder device contains steam initially at 1.2 MPa, 500°C, and 2.8 m' Steam is al to...
12) A piston-cylinder device contains 0.6 kg of water vapor at 200 ° C and 0.5 MPa The steam is cooled under constant pressure, until half is condensed of its mass. a) Calculate the final temperature. b) Determine the volume change.
(4 points) Steam A spring-loaded piston cylinder initially contains 4.2 kg of steam at 120° C and with a quality of 50%. The device is heated until the pressure of the steam is 500 kPa and the temperature is 200° C. Determine the boundary work done by the steam during this process. 0 kJ Determine the total heat transferred during this process. 0 kJ
100 kg of steam is enclosed in a piston-cylinder device initially at 300°C and 5 bar It expands and cools to 200°C and 1 bar. What is the change in entropy?
Five kg of water is contained in a piston–cylinder assembly, initially at 5 bar and 360°C. The water is slowly heated at constant pressure to a final state. The heat transfer for the process is 2960 kJ and kinetic and potential energy effects are negligible. Determine the final volume, in m3, and the work for the process, in kJ.
Water is contained in a piston-cylinder device, where the piston can move in order to maintain a constant pressure of 300 kPa. Initially, the temperature of the water is 200 degrees Celcius. Heat is removed from the water until it reaches a quality of 0.1. Find the amount of heat transfer to achieve this, in kJ/kg. Answer value in kj/kg
1.Water vapor contained in a piston–cylinder assembly undergoes an isothermal expansion at 277°C from a pressure of 5.1 bar to a pressure of 2.7 bar. Evaluate the work, in kJ/kg. 2.Nitrogen (N2) contained in a piston–cylinder arrangement, initially at 9.3 bar and 437 K, undergoes an expansion to a final temperature of 300 K, during which the pressure–volume relationship is pV1.1 = constant. Assuming the ideal gas model for the N2, determine the heat transfer in kJ/kg. 3.Argon contained in...