FUND OF ENG THERMODYN(LLF)+WILEYPLUS
9th Edition
ISBN: 9781119391777
Author: MORAN
Publisher: WILEY
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3. For the Carnot engine cycle for a system containing one mole of ideal gas (p,V data points given below),
calculate the change in entropy of the system for each stage of the cycle (Steps 1, 2, 3, and 4) and the
overall change in entropy of the system for a complete cycle. You may assume that each measurement
of the data is accurate to at least two significant figures.
Data Points (p,V):
Point A: p = 70 kPa, V = 0.100 m3
Point B: p = 35 kPa, V = 0.200 m3
Point C: p = 10 kPa, V = 0.400 m3
Point D: p = 20 kPa, V = 0.200 m3
Step 1: Isothermal expansion from point A to point B.
Step 2: Adiabatic expansion from point B to point C.
Step 3: Isothermal compression from point C to point D.
Step 4: Adiabatic compression from point D back to point A.
A vessel of volume 0.04 m3 contains a mixture of saturated water and steam at a temperatureof 250°C. The mass of the liquid present is 9 kg. Find the pressure, mass, specific volume,enthalpy, entropy and internal energy.
Find the total heat in kJ required for ice at -15°C to become vapor at 120°C.
2. Using the Steam Table shown, at initial pressure of 0.046 bar and final pressure of 0.107 bar, find the following:
Δhf ; Δhg ; Δsf ; Δsg
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- can you help me with this question that i found onlinearrow_forward4.1 1 kg of steam at 20 bar, dryness fraction 0.9, is heated reversibly at constant pressure to a temperature of 300°C. Calculate the heat supplied, and the change of entropy, and show the process on a T-s diagram, indicating the area which represents the heat flow. (415 kJ/kg; 0.8173 kJ/kg K) 4.2 Steam at 0.05 bar, 100°C is to be condensed completely by a reversible constant pressure process. Calculate the heat rejected per kilogram of steam, and the change of specific entropy. Sketch the process on a T-s diagram and shade in the area which represents the heat flow. (2550 kJ/kg; 8.292 kJ/kg K) 4.3 0.05 kg of steam at 10 bar, dryness fraction 0.84, is heated reversibly in a rigid vessel until the pressure is 20 bar. Calculate the change of entropy and the heat supplied. Show the area which represents the heat supplied on a T-s diagram. (0.0704 kJ/kg K; 36.85 kJ) 4.4 A rigid cylinder containing 0.006 m' of nitrogen (molar mass 28 kg/kmol) at 1.04 bar, 15°C, is heated reversibly until…arrow_forwardIn a gas apparatus, it was recorded that the expansion index was 1.26 andthe molar mass of gas is 26 kg/kmol. The gas is taken as a perfect gas andexpands reversibly from 727 ˚C, 0.003 m3to 2 ˚C, 0.6 m3 , according to a linear law. 1. the change in specific entropy, (3)2. the heat supplied, and (2)3. the work output.arrow_forward
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