FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119634928
Author: Borgnakke
Publisher: WILEY
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Air at 1000 Co, 1.0 MPa expands in a polytropic process with n = 1.3 to a pressure of 250 kPa. Find
1- the final temperature
2- the specific work output
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.
How much entropy is transferred if 200 W of thermal energy are transferred to a heat sink at 300K?
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- Four kilograms of steams is initially at 1 MPa and x=40% inside the piston cylinder. There is a 30C superheat introduced in steam isopiestically.Find the change of entropy of the steam.arrow_forwardone kg of air is compressed in a cylinder according to the law PV^1.3= constant. If intital temperature is 100°C amd compression ratio is 15, find the work done and change in entropy of air.arrow_forwardA piston/cylinder has a water volume separated in VA = 0.3 m³ and VB = 0.4 m by a stiff membrane. The initial state in A is 1000 kPa, x = 0.8 and in B it is 1500 kPa and 250°C. Now the membrane ruptures and the water comes to a uniform state at 200°C. What is the final pressure? Find the work and the heat transfer in the process. Po mp cb A:H2O B:H20arrow_forward
- I need the answer as soon as possiblearrow_forwardA car or engine takes 2000 J of heat from a reservoir at 500 K, does some work, and discards some heat to a reservoir at 350 K. Find the total entropy change in the engine during one cyclearrow_forwardCalculate the workdone, heat transfer and change in entropy. Do not need to solve. I just need the steps to solve it e.g equations etc.arrow_forward
- A pressure cooker 6 ltrarrow_forwardSteam at 7 bar, dryness fraction 0.96, is throttled-down to 3.5 bar. Solve for the change of entropy per unit mass of steam and show the process on T-s diagram.arrow_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_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