FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119634928
Author: Borgnakke
Publisher: WILEY
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2. The gas expanding in the combustion space of a reciprocating engine has an initial pressure of SO
bar and an initial temperature of 1623*C. The initial volume is 50000 mm' and the gas expands
through a volume ratio of 20 according to the law pV constant. Calculate w and AU
Take R= 270 J/Kg K and C, = 800 J/Kg K. Assume n 1.38
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- Do step by steparrow_forwardA piston-cylinder system contains 0.3 m' of water at 2.4 MPa and 135°C. It is heated at constant pressure till the mixture became 25% liquid and 75% vapor by volume. The steam then expanded to 12.5 bar according to the law PV4=C. Find the total heat and work done. 03:arrow_forward2) Two glass bulbs, one on the left with a volume of 2 liters and the other on the right with avolume of 6 liters, are connected to one another by a thin tube that is initially closed by astopcock. The bulb on the left has 0.1 moles of ideal gas, and the bulb on the right isevacuated. The system is in thermal equilibrium with the surroundings at 300K. When thestopcock is opened, the gas flows out to fill both bulbs. Calculate A for this process. If wewere to insert a propeller to extract work as the gas flows from left to right, what is themaximum amount of work that we could possibly extract?arrow_forward
- Assuming air is an ideal gas composed of only O2 and N2 how much heat is necessary to heat the air isobarically from 30 degrees celsius to 500 degrees celsius? We are given the conditions that pressurized air is at 30 degrees Celcius and 5 bar. It is then preheated to 500 degrees celsius and then compressed to 35 bar. The air compressor operated at a 75% efficiency.arrow_forwardA rigid 11-L vessel initially contains a mixture of liquid, water and vapor at 105o C with 10.9 percent quality. The misture is then heated until its temperature is 170o C. Calculate the heat transfer required for this process.arrow_forwardRefrigerant R-134a vapor in a piston-cylinder assembly, it is increased to 50°C under constant pressure operation from 8 bar saturated steam. Calculate the work and heat transfer per unit mass for refrigerant. (kJ/kg) Changes in kinetic and potential energy can be neglected.arrow_forward
- show some graph where the 1st and 2nd point locatearrow_forward1. A vertical cylinder fitted with a piston contains 5 (kg) of R134a at 12°C. Heat is transferred at constant pressure causing the piston to rise until it hits a set of stops at which point the volume is doubled. Additional heat is added at constant volume to raise the temperature to 70°C and pressure to 1.4 MPa. Sketch the process on Pv and Tv diagrams. Find the heat transfer and work done for both processes. Ignore kinetic and potential effects.arrow_forwardA rigid tank contains 0.5 kg of moist air at 1.034 MPa, 160 C, and φ = 100%. We now cool the tank until its temperature drops to 82 C. Find a) the amount of heat removedarrow_forward
- PROBLEM 2. A certain gas with cp = 0.53 Btu/lb°R and R = 96 ft-lb/lb°R, expands from 6 ft3 and 90°F to 16 ft^3 while the pressure remains constant at 40 psia. Compute the final temperature in deg F. 550 O 1050 O 1810 O 1490 O 200arrow_forwardI need solution within 30 Minutes, Please don't take more than that.arrow_forwardPlease show correct solution and clear explanation. Choose from the choices for the correct answer. Thank you.arrow_forward
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