Fundamentals of Thermodynamics-Solution Manual 8th. Edition by Claus Borgnakke, Richard E. Sonntag | Holooly

Fundamentals of Thermodynamics-Solution Manual [EXP-6595]

2996 SOLVED PROBLEMS

Question: 3.171

10 kg of water in a piston cylinder arrangement exists as saturated liquid/vapor at 100 kPa, with a quality of 50%. It is now heated so the volume triples. The mass of the piston is such that a cylinder pressure of 200 kPa will float it, as in Fig.3.171. Find the final temperature and the heat

Verified Answer:

Take CV as the water. Continuity Eq.:

m _{...

Question: 12.99

250-L tank contains propane at 30°C, 90% quality. The tank is heated to 300°C. Calculate the heat transfer during the process

Verified Answer:

\begin{aligned}& V =250 L =0.25 m...

Question: 7.117

A 0.2 m^3 initially empty container is filled with water from a line at 500 kPa, 200°C until there is no more flow. Assume the process is adiabatic and find the final mass, final temperature and the total entropy generation.

Verified Answer:

C.V. The container volume and any valve out to lin...

Question: 11.140

A 0.2 m^3 insulated, rigid vessel is divided into two equal parts A and B by an insulated partition, as shown in Fig. P11.140. The partition will support a pressure difference of 400 kPa before breaking. Side A contains methane and side B contains carbon dioxide. Both sides are initially at 1 MPa,

Verified Answer:

\begin{aligned}&\Delta P _{ MAX }=400 ...

Question: 7.51

A 0.5 m^3 tank contains carbon dioxide at 300 K, 150 kPa is now filled from a supply of carbon dioxide at 300 K, 150 kPa by a compressor to a final tank pressure of 450 kPa. Assume the whole process is adiabatic and reversible. Find the final mass and temperature in the tank and the required work

Verified Answer:

C.V. The tank and the compressor. Continuity Eq.4....

Question: 3.209

A 0.5-m-long steel rod with a 1-cm diameter is stretched in a tensile test. What is the required work to obtain a relative strain of 0.1%? The modulus of elasticity of steel is 2 × 10^8 kPa.

Verified Answer:

-_{1} W _{2}=\frac{ AEL _{0}}{2}( e )^{2}, ...

Question: 4.18

A 0.6 m diameter household fan takes air in at 98 kPa, 20°C and delivers it at 105 kPa, 21°C with a velocity of 1.5 m/s. What are the mass flow rate (kg/s), the inlet velocity and the outgoing volume flow rate in m^3/s?

Verified Answer:

Continuity Eq.

\dot{ m }_{ i }=\dot{...

Question: 6.227E

A 1 gallon jug of milk at 75 F is placed in your refrigerator where it is cooled down to the refrigerators inside temperature of 40 F. Assume the milk has the properties of liquid water and find the entropy generated in the cooling process.

Verified Answer:

C.V. Jug of milk. Control mass at constant pressur...

Question: 4.204E

A 1 Gallon tank initially is empty and we want to have 0.03 lbm of R-410A in it. The R-410A comes from a line with saturated vapor at 20 F. To end up with the desired amount we cool the can while we fill it in a slow process keeping the can and content at 20 F. Find the final pressure to reach

Verified Answer:

C.V. Tank: Continuity Eq.4.20:

m _...

Question: 8.75

A 1 kg block of copper at 350°C is quenched in a 10 kg oil bath initially at ambient temperature of 20°C. Calculate the final uniform temperature (no heat transfer to/from ambient) and the change of exergy of the system (copper and oil).

Verified Answer:

C.V. Copper and oil.

C _{ co }=0...

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