FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119634928
Author: Borgnakke
Publisher: WILEY
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CA ges contained in a cylinder is compressed from 1 MPa and 0.05 m² to 2 MPa.
Compression is governed by pV4 = constant. Internal energy of gas is given by
U = 7.5 pV - 425, kj
where p is pressure in kPa and V is volume in m'. Determine heat, work and change in
internal energy assuming compression process to be quasistatic. Also find out work
interaction, if the 180 kJ of heat is transferred to system between same states. Also
explain, why is it different from above.
A rigid steel tank contains 0.5 kg R410A at 0°C
with a specific volume of 0.01 m³/kg. The whole
system is now heated to a room temperature of
25°C. Find the final P and the process heat transfer.
Q.3
Find the increase in unavailable energy
associated with transfer of 800kJ of heat
from a constant temperature system at
600K to another constant temperature at
400K. The ambient temperature is 300K.
A
150kJ
В
182kJ
C
200kJ
D
220kJ
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- Find the work posses for a carbon dioxide gas at 1,995.59 C in kJ/kg. (Use W = mRT)arrow_forward1.4 1kg of a fluid expands reversibly according to a lincar law from 4.2 bar to 14 bar; the initial and final volumes are 0.004 m' and 002 m. The fluid is then cooled reversibly at constant pressure, and finally compressed reversibly according to a law pe= constant back to the initial conditions of 4.2 bar and 004 m. Calculate the work done in cach process and the net work of the cycle. Sketch the cycle on a p- diagram. (-4480 N m: +1120N m, + 1845 N m, -15IS N m)arrow_forwardA system produces 10 BTU of work upon addition of 50 kj of heat. Find the heat rejected in ft-lbf.arrow_forward
- A fraction of some power to a motor (1), 2 kW, is turned into heat transfer at 500 K (2) and then it dissipates in the ambient at 300 K (3). Give the rates of exergy along the process 1-2-3.arrow_forwardof air at 300 K and 150 kPa. It's now heated in a two- Q: A piston cylinder contains 1.5 step processes: first by a constant volume process to 1000 K second a constant pressure process to 1500 K. find the heat transfer for this processes.arrow_forwardSolve it fastarrow_forward
- Air 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_forward3kg 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_forwardEnergy is added to 5 kg of air with a paddle wheel until T = 100 C. Find the paddle wheel work if the rigid container is insulated.arrow_forward
- 10arrow_forward3. A heat sink for computer server absorbs all the heat generated and cools down by air flow. The air flow is 15 liter/s. The density of air near the heat sink is 1.25 kg/m³. The specific heat of air at constant pressure is 1,010 and the room air is 20°C. can handle. J/kg-°C. The temperature at the heat sink is 50°C, Find the server (heat) power in Watt that the heat sinkarrow_forwardI need the answer as soon as possiblearrow_forward
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