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1. A 6 kg brass ball whose specific heat is 0.40 kJ/kg. C is brought in...
An 8 m3 batch of oil with specific heat of 2 kJ/(kg K) and density of...
An 8 m3 batch of oil with specific heat of 2 kJ/(kg K) and density of 850kg/m3 is being heated in a steam-jacketed, agitated vessel with 1.5 m2 of heating surface. The convective heat-transfer coefficient on the oil side is 500W/(m2K), and 10,000 W/(m2K) on the steam side. If the steam temperature is 130°C and the initial temperature is 20 °C, estimate the oil temperature after 10 minutes.
An aluminum block weighing 32 kg initially at 140°C is brought into contact with a block...
An aluminum block weighing 32 kg initially at 140°C is brought into contact with a block of iron weighing 44 kg at 60°C in an insulated enclosure. Determine the final equilibrium temperature and the total entropy change for this process. The specific heat of aluminum at 400 K is Cp0.949 kJ/kg.K. The specific heat of iron at room temperature is Cp=0.45 kJ/kg.K. The final equilibrium temperature is 108,35 K. The total entropy change for this process is 397 kJ/K
Tubular heat exchanger design A liquid food (with specific heat 3.9 kJ/[kg °C]) flows in the...
Tubular heat exchanger design A liquid food (with specific heat 3.9 kJ/[kg °C]) flows in the inner pipe of a double pipe heat exchanger. The liquid food enters the heat exchanger at 72°C and exits at 6°C at a flow rate of 0.5 kg/s. In the annular section, cold water at 2°C enters the heat exchanger and flows concurrently at a flow rate of 12 kg/s. The average specific heat of water is 4.10 kJ/(kg °C). Assuming steady-state conditions. a)...
3. Water has the specific heat 4.186 kJ/kg. °C, a boiling point of 100°C, and a...
3. Water has the specific heat 4.186 kJ/kg. °C, a boiling point of 100°C, and a heat of vaporization of 2260 kJ/kg. A sealed beaker contains 100 g of water that's initially at 20°C. If the water absorbs 100 kJ of heat, what will its final temperature be? (A) 100°C (B) 119°C (C) 143°C (D) 183°C (E) 239°C 4. On a cold winter day (5°C), the founda- tion block for a statue is filled with 2.0 m of concrete. By...
Room 90 m 12°C 1) A container filled with 45 kg of liquid water at 95°C...
Room 90 m 12°C 1) A container filled with 45 kg of liquid water at 95°C is placed in a 90-m room that is initially at 12°C. Thermal equilibrium is established after a while as a result of heat transfer between the water and the air in the room. Using constant specific heats, determine (a) the final equilibrium temperature, (b) the amount of heat transfer between the water and the air in the room, and (c) the entropy generation. Assume...
A sample of metal with a specific heat capacity of kg C kJ 0.50 ×° is...
A sample of metal with a specific heat capacity of kg C kJ 0.50 ×° is heated to 98°C and then placed in an 0.055 kg sample of water at 22°C. When equilibrium is reached, the final temperature is 35°C. What was the mass of the metal? I know the answer is 0.0948 kg I’m just not sure how to solve it
PROBLEM 3 (45 points) The condenser of a large steam power plant is a heat exchanger...
PROBLEM 3 (45 points) The condenser of a large steam power plant is a heat exchanger in which steam is condensed to liquid water. Assume the condenser to be a parallel flow shell-and-tube heat exchanger consisting of a single shell and 1x10 tubes, each executing two passes. The inner diameter of tubes is D = 50 mm and its thickness is 5 mm (Do not ignore the thickness). The steam condenses on their outer surface. Thermal conductivity of the tube...
Problem 3: A 9-m container is filled with 300 kg of R-134a at 10°C. What is...
Problem 3: A 9-m container is filled with 300 kg of R-134a at 10°C. What is the specific enthalpy of the R-134a in the container? Problem 4: a piston-cylinder device contains 0.6 kg of steam at 200 Cand 0.5 MPa. Steam is cooled at constant pressure until one-half of the mass condenses. Show the process on a T-v diagram b) a) Find the final temperature c) Determine the volume change Problem 5:10 kg of R-134a at 320 kPa fills a...
1) Which substance will heat up faster: Aluminum (s) specific heat = 0.90 J/g°C Brass (s)...
1) Which substance will heat up faster: Aluminum (s) specific heat = 0.90 J/g°C Brass (s) specific heat = 0.380 J/g°C 2)A student mixes 50.0 mL of a 0.100 M AgNO3 solution with 50.0 mL of a 0.100 M HCl solution in a coffee cup calorimeter. Upon mixing the temperature of the resulting solution increases from 22.30°C to 23.11°C. If we assume the resulting solution has a final volume of 100.0 mL and the density and specific heat of the...
A thermometer of mass 0.0404 kg and of specific heat 0.892 kJ/kg K reads 14.5°C. It...
A thermometer of mass 0.0404 kg and of specific heat 0.892 kJ/kg K reads 14.5°C. It is then completely immersed in 0.219 kg of water, and it comes to the same final temperature as the water. If the thermometer then reads 46.4°C, what was the temperature of the water before insertion of the thermometer? umbe Units T C the tolerance is +/-2%
An aluminum block weighing 32 kg initially at 140°C is brought into contact with a block of iron weighing 44 kg at 60°C in an insulated enclosure. Determine the final equilibrium temperature and the total entropy change for this process. The specific heat of aluminum at 400 K is Cp0.949 kJ/kg.K. The specific heat of iron at room temperature is Cp=0.45 kJ/kg.K. The final equilibrium temperature is 108,35 K. The total entropy change for this process is 397 kJ/K
3. Water has the specific heat 4.186 kJ/kg. °C, a boiling point of 100°C, and a heat of vaporization of 2260 kJ/kg. A sealed beaker contains 100 g of water that's initially at 20°C. If the water absorbs 100 kJ of heat, what will its final temperature be? (A) 100°C (B) 119°C (C) 143°C (D) 183°C (E) 239°C 4. On a cold winter day (5°C), the founda- tion block for a statue is filled with 2.0 m of concrete. By...
Room 90 m 12°C 1) A container filled with 45 kg of liquid water at 95°C is placed in a 90-m room that is initially at 12°C. Thermal equilibrium is established after a while as a result of heat transfer between the water and the air in the room. Using constant specific heats, determine (a) the final equilibrium temperature, (b) the amount of heat transfer between the water and the air in the room, and (c) the entropy generation. Assume...
PROBLEM 3 (45 points) The condenser of a large steam power plant is a heat exchanger in which steam is condensed to liquid water. Assume the condenser to be a parallel flow shell-and-tube heat exchanger consisting of a single shell and 1x10 tubes, each executing two passes. The inner diameter of tubes is D = 50 mm and its thickness is 5 mm (Do not ignore the thickness). The steam condenses on their outer surface. Thermal conductivity of the tube...
Problem 3: A 9-m container is filled with 300 kg of R-134a at 10°C. What is the specific enthalpy of the R-134a in the container? Problem 4: a piston-cylinder device contains 0.6 kg of steam at 200 Cand 0.5 MPa. Steam is cooled at constant pressure until one-half of the mass condenses. Show the process on a T-v diagram b) a) Find the final temperature c) Determine the volume change Problem 5:10 kg of R-134a at 320 kPa fills a...
A thermometer of mass 0.0404 kg and of specific heat 0.892 kJ/kg K reads 14.5°C. It is then completely immersed in 0.219 kg of water, and it comes to the same final temperature as the water. If the thermometer then reads 46.4°C, what was the temperature of the water before insertion of the thermometer? umbe Units T C the tolerance is +/-2%
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