FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119634928
Author: Borgnakke
Publisher: WILEY
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An amount of 4000 BTU of heat is transferred from a reservoir at 800 deg. F to a reservoir at 200 deg. F. Find the entropy change of the system.
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1.Five kilogram of steam is initially at 1MPa and y=40% inside the piston cylinder. There is a 50C superheat
introduced in steam isopiestically. Find the change of entropy of the steam.
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- 3kg of Co2 expanded in a stationary piston cylinder through a polytropic process from 30 degree Celsius and 250 kpa to 100kPa pressure. If the polytropic exponent, n = 1.45, find the total work, total heat transferred, total kinetic energy change and internal energy changearrow_forwardAir at 200kPa, 30°C is contained in a cylinder behind a piston with initial volume of 0.1 m3. The inside pressure balance ambient pressure of 100 kPa plus an external imposed force that proportional to V05, Now heat is transfer to the system to final pressure of 225 kPa. Find the work done for this process. (8.65 kJ)arrow_forwardRefrigerant R134a in piston cylinder assembly, 200 kPa in initial state pressure and in the form of saturated vapor. It is then reversed and The final pressure is 1000 kPa by being compressed in the adiabatic state change. a) Find the final temperature (°C). b) Find the work done (kj/kg). Note: The changes in kinetic and potential energies will be neglected.arrow_forward
- I need the solution for this problem pls. Thanks a lot.arrow_forwardSteam at 120 bar has a specific volume of 0.01721 m3/kg, find the temperature, enthalpy and the internal energy.arrow_forwardhelium in a steel tank is at 36 psia, 540 R with a volume of 4 ft^3 . it is used to fill a balloon. when the pressure drops to 18 psia, the flow of helium stops by itself. if all the helium is still at 540 R , how big a balloon is produced?arrow_forward
- i need the answer quicklyarrow_forwardHow much entropy is transferred if 200 W of thermal energy are transferred to a heat sink at 300K?arrow_forwardAir flows steadily through an engine at a constant temperature, 400K. Find the work per kilogram if the exit pressure is one-third the inlet pressure and the inlet pressure is 207 kPa. Assume that the kinetic and potential energy variation is negligible.arrow_forward
- A piston/cylinder receives (control mass system) R-134a at 300 kPa and compresses it in a process where the entropy does not change. to a state of 1000 kPa, 60° C. Find the initial temperature, AND THE CHANGE IN INTERNAL ENERGY.arrow_forward· A closed gaseous system undergoes a reversible process with constant pressure of 200kpa. 2500 kJ of heat is rejected, and the volume changes from 5m3 to 2m3. Find the change in internal energyarrow_forwardDuring an isentropic process of 3 lb/sec of air, the temperature increases from 50 deg F to 290 deg F. Find the work for a nonflow process.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