5. A system of I kg expands quasistaticly from I m'kg and I MPa to 3...
Problem 2 (25 points) gas expands in a piston-cylinder assembly from p1 8 bar, V 0.02 m to p2-2 bar. The relation between pressure and volume during the gas expansion process is p constant. The mass of the gas is 0.25 kg. If the specific internal energy of the gas decreases by 40 kJ/kg during the process, determine the heat transfer, in kJ Kinetic and potential energy effects are negligible.
4. A mass of 5 kg undergoes a process during which there is heat transfer from the mass at a rate of 6 kJ per kg, an elevation decrease of 34 m, and an increase in velocity from 13 m/s to 34 m/s. The specific internal energy decreases by 6 kJ/kg and the acceleration of gravity is constant at 9.7 m/s2. Determine the work for the process, in kJ. 5. A gas is compressed in a piston–cylinder assembly from p1...
How do i solve C??? Please details Steam enters a two stage steady state turbine at 8 MPa and 500 C. It expands in the first stage to a state of 2 MPa and 350°C. Steam is then reheated at constant pressure to a temperature of 500°C before it enters the second stage, where it exits at 30 kPa and a quality of 98%. The net power output of the turbine is 3 MW Assume the surroundings to be at...
TURBO MACHINES SUBJECT QUESTION 10 A multi-stage high -pressure steam turbine is supplied with steam at a stagnation pressure of 7 MPa and a stagnation temperature of 500°C. The corresponding specific enthalpy is 3410kJ.kg. The steam exhaust from the turbine at a stagnation pressure of 0.7 MPa abs., the steam having been in a super-heated condition throughout the expansion. It can be assumed that the steam behaves like a perfect gas over the range of the expansion and that v...
A diatomic ideal gas expands from a volume of VA-1.00 mºto V, - 3.00 m along the path shown in the figure below. The initial pressure is PA-2.00 x 10 Pa and there are 67.3 mol of gas. P(10%Pa) 4.00 8.00 2.00 1.00 1.00 2.00 3.00 100V (m) (a) Calculate the work done on the gas during this process. (b) Calculate the change in temperature of the gas. (c) Calculate the change in internal energy of the gas. (Take the...
3. A 10 kg block A is released from rest 2 m above the 5 kg plate P, which can slide freely along the smooth vertical guides BC and DE. The coefficient of restitution between the block and the plate is e 0.75. Determine the veloc 2 ity of the block and the plate just after impact. What is impact? The spring has an unstretched length of 600 m450 mm Ans: A 2.61 m/s, p 7.31 m/s and d 0.32...
s Q. Find the entropy and/or temperature of steam at the following states Region k/kg K) 5 MPa 1 MPa 18 MPa 400°C 40 kPa 40 kPa 120°C 50°C Quality, x-09, Mixed 71794 (<7.6700) Q. Determine the entropy change of water contained in a closed system as it changes phase rom saturated liquid to saturated vapor when the pressure is 0.1MPa and constant Why is the entropy change positive for this process? 2. Steam at 1 MPa, 6000C expands in...
A piston-cylinder device contains 10 kg of saturated water liquid at 0.4 MPa. Heat is transferred at constant pressure until the temperature reaches 400 °C. (68 marks) a) Show the process on a P-v diagram with respect to the saturation line? b) What is the initial temperature of the system? c) What is the initial quality x? d) What is the initial specific enthalpy of the system? e) Determine the initial total volume of the system. f) What is the...
A piston-cylinder device contains 5 kg of saturated water liquid at 0.3 MPa. Heat is transferred at constant pressure until the temperature reaches 500 -C. (84 marks) a) What is the initial temperature of the system? b) What is the initial quality x? c) What is the initial specific enthalpy of the system? d) What is the final state? e) Show the process on a P-v diagram with respect to the saturation line. 1) What is the final specific enthalpy?...
QUESTION 2 A piston-cylinder device contains 5 kg of saturated water liquid at 0.3 MPa. Heat is transferred at constant pressure until the temperature reaches 500 °C. (84 marks) What is the initial temperature of the system? b) What is the initial quality x? c) What is the initial specific enthalpy of the system? d) What is the final state? e) Show the process on a P-v diagram with respect to the saturation line. 1) What is the final specific...