FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119634928
Author: Borgnakke
Publisher: WILEY
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- A piston-cylinder device contains 0.15kg of air initially at 2 MPa and 350oC. The air is first expanded isothermally to 500 kPa, then compressed polytropically with a polytropic exponent of 1.2 to the initial pressure, and finally compressed at the constant pressure to the initial state. a. Indicate knowns and unknows for each state as well as what type ofprocess is performed to get from one state to another. State anyassumptions b. Determine the boundary work for each processc. Determine the net work of the cycled. Draw the P-v diagram for each processarrow_forwardInitially, the air with 180 kPa pressure and a volume of 1 m3 is heated up to 660 oC. Mass of air 68 kg calculate the entropy change that occurs during this heating process (Ideal gas for air You can use the equations).arrow_forwardI need the answer as soon as possiblearrow_forward
- A mass of an ideal gas has initial temperature of 160C .If the temperature is raised to 2800C.Find the change of internal energy and enthalpy.Assume the specific heat at constant pressure=1.065 KJ/KgK and specific heat at constant volume= 0.718 KJ/KgK.arrow_forwardThrough an isentropic process, a piston compresses 2 kg of an ideal gas at 150 kPa and 35C in a cylinder to a pressure of 300 kPa. The specific heat of the gas for constant pressure processes is 5 kJ/kg-K; for constant volume processes, the specific heat is 3 kJ/kg-K. What is the final temperature of the gas in degree Celsius? (Show step by step solution and good handwritten)arrow_forwardYou have an adiabatic steam turbine. The steam enters a 0.1m diameter pipe at 200 m/s and it at state conditions of 773K and specific volume of 0.0482 m?/kg. When it exits the turbine as a saturated mixture at 393K its specific volume is 0.665 m²/kg. Using the first law for control volumes, find the work output of the turbine. You can neglect the change in KE and PE.arrow_forward
- Do not give answer in image formet and hand writingarrow_forwardA certain gas with One kilogram of mass, 100 kPa and 45°C is compressed adiabatically until the volume is minimizes to one sixteenth of its original rate. So, heat is further at persistent pressure until the temperature is 1450 °C. The gas is then extended adiabatically till to its initial volume is got and lastly it is cooled at constant volume till the original state of 100 kPa and 1450 °C is reached. Calculate the work done, internal energy and heat transferred for each process. [Take y = 1.4, Cp = 1.004 kJ/kg.K]arrow_forward0.05 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)arrow_forward
- Saturated liquid water at 5 bar is heated until it is superheated steam at 30 bar and 650ºC. What is the temperature change? What is the colume change? What is the enthalpy change?arrow_forwardFind the enthalpy of steam at 0.1975 MPa with specific internal energy of 2700 kJ/kgarrow_forwardAir at 20℃, 100 kPa is compressed in a piston/cylinder without any heat transfer to apressure of 200 kPa. How do the properties (T, v, u and s) change? (increase, aboutthe same or decrease).arrow_forward
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What is entropy? - Jeff Phillips; Author: TED-Ed;https://www.youtube.com/watch?v=YM-uykVfq_E;License: Standard youtube license