A fluid at 0.5 bar occupying 0.07 m3 is compressed reversibly to a pressure of 11.2 bar and specific volume of 0.5 m/kg according to the law pvn = c. The fluid then expands reversibly according to the law pv = c to 1.5 bar. A reversible cooling at constant volume then restores the fluid back to initial state. Calculate the work for the expansion in the process in Joules.

A fluid at 0.5 bar occupying 0.07 m3 is compressed reversibly to a pressure of 11.2 bar and specific volume of 0.5 m/kg according to the law pvn = c. The fluid then expands reversibly according to the law pv = c to 1.5 bar. A reversible cooling at constant volume then restores the fluid back to initial state. Calculate the work for the expansion in the process in Joules.

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

See similar textbooks

Similar questions

A fluid is heated reversibly at a constant pressure of 1.05 bar until it has a specific volume of 0.1 m'/kg. It is then compressed reversibly according to a law pu = constant to a pressure of 4.2 bar, then allowed to expand reversibly according to a law pel.- constant, and is finally heated at constant volume back to the initial conditions. The work done in the constant pressure process is -515 N m, and the mass of fluid present is 0.2 kg. Calculate the net work of the cycle and sketch the cycle on a p-v diagram.
One kg of fluid is compressed reversibly according to a law PV=0.25, where p in bar and v in m'/kg. The final volume is one-fourth the initial volume. Calculate the work done on the fluid and sketch the process on the P-V diagram. (34 660 J)
A cylinder is fitted with a freely movable piston of area 1.20e-2m^2 and negligible mass. The cylinder below the piston is filled with a gas. At state 1 the gas has volume 1.50e-3m^3, pressure 1.02e5Pa, and the cylinder is in contact with a water bath at a temperature of 0.0C. The gas is then taken through the following four step process. - A 2.50kg metal block is placed on top of the piston, compressing the gas to state 2, with the gas still at 0.0 C. - The cylinder is then brought in contact with a boiling water bath, raising the gas temperature to 100C at state 3. - The metal block is removed and the gas expands to state 4 still at 100C. - Finally, the cylinder is again placed in contact with the water bath at 0C, returning the system to state 1. a) Determine the pressure of the gas in state 2. b) Determine the volume of the gas in state 2. C) Determine the volume of the gas in state 4. Answer all parts, ABC
1.2 1 kg of a fluid is compressed reversibly according to a law pu= 0.25, where p is in bar and v is in m'/kg. The final volume is done on the fluid and sketch the process on a p-r diagram. of the initial volume. Calculate the work (34 660 Nm)
Q3 The gases in the cylinder of an internal combustion engine have a specific internal energy of 800 kJ/kg and specific volume of 0.06 m3/kg at the beginning of expansion. The expansion of the gases may be assumed to take place according to a reversible law, pv'= constant, from 55 bar to 1.4 bar. The specific internal energy after expansion is 230 kJ/kg. Calculate the heat rejected to the cylinder cooling water per kilogram or gases during the expansion stroke. The worke done by the system is 465.96 kj/kg
0.05 m² of gas at 6.9 bar expands reversibly in a cylinder behind a piston according to a law PV' 25=C until the volume is 0.08 m². Calculate the work done by the gas and sketch the process on the P-V diagram. (15 300 J)
A radiator by steam is used to heat a closed room. Heat is lost from the room to the outside at a rate of heat transfer by Newton Law. The outside temperature of the room is 5 C and dimensions of room are 3 mx 4 m × 5 m. Saturated steam at 4.0 bar condenses in the radiator and emerges as a liquid at the saturation temperature. The temperature inside the room at the initial radiator is turned on is 18 C. The overall heat transfer coefficient between inside and outside room is 28 W/m² C. The heat capacity of air to be constant is 36 J/(mol C). (a) Write a differential energy balance on the room air. (b) Integrate the unsteady-state balance to calculate the time required to achieve a temperature of 22 C.
A monatomic ideal gas is compressed isothermally from a volume of 2.0m^3 to 1.0 m^3. The initial pressure is 20 kPa. a. Find the work done on the gas from initial state to final state. b. Find the change in the internal energy of the gas. c. Find the amount of heat exchanged.
Steam at 416 Pa and 166K has a specific volume of 0.41 m^3/kg and a specific enthalpy of 29.4 kJ/kg. Find the internal energy per kilogram of steam.
Steam expands reversibly in a cylinder behind a piston from 6 bar dry saturated, to a pressure of 0.65 bar. Assuming that the cylinder is perfectly thermally insulated, calculate the work done during the expansion per kilogram of steam
Oxygen (molar mass 32 kg/kmol ) expands reversibly in a cylinder behind a piston at a constant pressure of 3 bar. The volume initially is 0.0133 m and finally is 0.0307 m3: the initial temperature is 16.48 °C. Calculate the absolute temperature after expansion with the correct unit. Assume oxygen to be a perfect gas and take the specific heat at constant pressure as 0.917kJ/kg K.
In the boiler of a steam engine the superheated steam is at 500 degrees Celsius and 20 mPa is created by adding an amount of heat to the pressured water. Erros up to 10% have come up. Find the ideal gas law. Could the error seen in testing be due to the ideal gas law assumption? - value from the ideal gas law - value from tables - %Error Which of the above values is the most accurate? Could the error seen in testing be due to the ideal gas law assumption?