FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119634928
Author: Borgnakke
Publisher: WILEY
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4.
A) Wet steam at 200 deg C has a specific enthalpy of 2300 kJ/kg (in the 2 phase region). Determine
the quality and specific volume and specific entropy of the mixture.
B) Calculate change in entropy of an ideal gas that expands freely to twice its volume, assume
isothermal reversible process. What is the work done in the process 2
One mol of an ideal gas is taken through
The gas is subjected
a three-step cyclic process.
successively to an isothermal expansion at 600 K from
5 to 3 bar (path a to b), a constant-pressure cooling
(b to c), and a constant-volume heating (c to a). All
processes are reversible. Cy
and Cp
AH for each step and for the entire process. Draw
the cycle on the PV diagram. Compile all results in a
table, as follows:
21.686 J mol-K-1
=30 J mol-1K-1. Calculate Q, W, AU and
%3D
Please show correct solution and clear explanation. Choose from the choices for the correct answer. Thank you.
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- 9. Helium is compressed in an adiabatic cylinder from 70°F, 10 ft³, 15 psia to 1 ft³ according to the relation pVK = c. Find the work nonflow, the final temperature and the change of enthalpy.arrow_forward2000 kg cast iron hoisin at 350 degree Celsius is quenched in 4000 kg of water at 15 degree Celsius. Find the amount of heat transferred to the water bath, entropy change for water and cast iron, use the entropy generation to prove that the entire system does not violate the second law of thermodynamics. Water specific heat of 4.18kj/kg.k, cast iron specific heat of 0.42kj/kg.karrow_forward6.123E A piston/cylinder has R-410A at 60 psia and compresses it in a reversible adiabatic process to 400 psia, 200 F. Find the initial temperature. - Sketch and label the process on a T-s diagram and solve.arrow_forward
- 10 moles of a diatomic gas are subjected to a thermal cycle as shown in the figure calculate: a) the Carnot efficiency of the cycle b) the actual efficiency of the cycle. Consider that the CA process is adiabatic. c) the entropy change at each stage. See the picturearrow_forward1 mol of ideal gas was isothermally compressed but irreversible @130degreecelcius from from 2.5 to 6.5 bar in a piston. The needed work is 30%>reversible work of this process (isothermal). The transferred heat from gas flows to heat sink @25degcelcius during the compression. Find entrophy changes, total entropy and the heat sink.arrow_forwardOne way to determine the quality of saturated steam is to throttle the steam to a low enough pressure that it exists as a superheated vapor. Saturated steam at 500 kPa is throttled to 0.1 MPa, 100 oC. Determine the quality of the steam at 400 kPa side. (Starts the calculation from mass and energy conservation)arrow_forward
- True of False, show steps please If 5 kJ of heat is transferred from resevoir at -5°C to 20 °, the total entropy change exceeds -20J/Karrow_forwardWater Vapor pressure 8 MPa and 350 in an adiabatic turbineIt enters at a temperature of oC and at a pressure of 750 kPacomes out. Reversible The amount of work done by the unit mass of steam for the processcalculate.arrow_forwardHelium at 100 kPa, 500 K is in a piston/cylinder setup and is compressed to a final pressure of 800 kPa. Consider helium as an ideal gas with constant specific heat capacities. Find the final temperature and the specific work if the above process is (i) reversible adiabatic (ii) reversible isothermalarrow_forward
- A 400-L tank, A contains argon gas at 250 kPa, 30°C. Cylinder B, having a frictionless piston of such mass that a pressure of 150 kPa will float it, is initially empty. The valve is opened and argon flows into B and eventually reaches a uniform state of 150 kPa, 30°C throughout. What is the work done by the argon?arrow_forwardPlease be very detailedarrow_forward2.A piston cylinder arrangement contains steam at 10MPaa saturated liquid. Heat was transferred isothermally so that the pressure reaches 2MPaa. а. Find the final temperature of the steam. b. Find the change of entropy in kJ/kg if there is no entropy production.arrow_forward
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