Schaum’s Outline Of Thermodynamics For Engineers 4th. Edition by Merle C. Potter Craig W. Somerton | 9781260456523 | 1260456528 | Holooly

Schaum’s Outline Of Thermodynamics For Engineers [EXP-8098]

412 SOLVED PROBLEMS

Question: FINAL EXAM . 10

200 kg of a solid at 0°C is added to 42 kg of water at 80°C. The final temperature is: (A) 58°C (B) 52°C (C) 48°C (D) 42°C

Verified Answer:

\text { (D) } \quad m_{s} C_{s} \Delta T_{...

Question: FINAL EXAM . 22

200 kJ/kg of heat is added to air in a steady-flow heat exchanger. The temperature rise is:(A) 200°C (B) 220°C (C) 240°C (D) 260°C

Verified Answer:

\text { (A) } \quad q=\Delta h=C_{p} \Delt...

Question: EXAM 1 .3

3. In thermodynamics, we focus our attention on which form of energy? (A) kinetic (B) potential (C) internal (D) total

Verified Answer:

(C) Internal energy is of primary importance.

Question: EXAM 1 .10

A 0.2-m^3 tire is filled with 25°C air until P = 280 kPa. The mass of air is nearest: (A) 7.8 kg (B) 0.888 kg (C) 0.732 kg (D) 0.655 kg

Verified Answer:

(B) m = PV/RT = 380 × 0.2/(0.287 × 298) = 0.888 kg

Question: 1.SP.15

A 0.8-lbm object traveling at 200 ft/s enters a viscous liquid and is essentially brought to rest before it strikes the side. What is the increase in internal energy, taking the object and the liquid as the system? Neglect the potential energy change.

Verified Answer:

Conservation of energy requires that the sum of th...

Question: 1.SP.14

A 10-kg body falls from rest, with negligible interaction with its surroundings (no friction). Determine its velocity after it falls 5 m.

Verified Answer:

Conservation of energy demands that the initial en...

Question: 4.SP.20

A 10-m^3 tank is being filled with steam at 800 kPa and 400°C. It enters the tank through a 10-cm-diameter pipe. Determine the rate at which the density in the tank is varying when the velocity of the steam in the pipe is 20 m/s.

Verified Answer:

The continuity equation with one inlet and no outl...

Question: 3.EX.9

A 10-m-long by 3-m-high wall is composed of an insulation layer with R = 2 m^2· K/W and a wood layer with R = 0. 5 m^2· K/W. Estimate the heat transfer rate through the wall if the temperature difference is 40°C.

Verified Answer:

The total resistance to heat flow through the wall...

Question: 3.EX.5

A 100-kg mass drops 3 m, resulting in an increased volume in the cylinder of 0.002 m^3 (Fig. 3.6). The weight and the piston maintain a constant gage pressure of 100 kPa. Determine the net work done by the gas on the surroundings. Neglect all friction.

Verified Answer:

The paddle wheel does work on the system, the gas,...

Question: 3.EX.2

A 110-mm-diameter cylinder contains 100 cm^3 of water at 60°C. A 50-kg piston sits on top of the water. If heat is added until the temperature is 200°C, find the work done.

Verified Answer:

The gage pressure in the cylinder is due to the we...

Loading...