Homework Answers
![ma 4 kg Di = 0.3mPa 7 b. z 104.83 Kolky Ti = 25°c I s = 0.3672 Kol ligh a = m (harbij 10,000 = 4( be- 104.83] i h = 2604,83 k](http://img.homeworklib.com/questions/7816bee0-8e53-11eb-b49d-8ba6b2bebae5.png?x-oss-process=image/resize,w_560)
Problem 3 A rigid 6L-tank contains 3.3 kg of water initially at 30°C. The tank is...
Problem 3 A rigid 6L-tank contains 3.3 kg of water initially at 30°C. The tank is heated to 175°C by a heat pump that receives heat from surroundings transfer to the water, (b) the change in entropy at 25°C. The process is reversible. Find (a) the heat
Problem 3 A rigid 6L-tank contains 3.3 kg of water initially at 30°C. The tank is heated to 175°C by a heat pump that receives heat from surroundings transfer to the water, (b)...
What is the generated entropy (in kJ/K) when 1 kg of liquid water at 25°C is...
What is the generated entropy (in kJ/K) when 1 kg of liquid water at 25°C is heated to saturated vapor at 100°C in an oven that is at 150°C. Hint: the effect of pressure on the entropy of liquids or solids is usually negligible. Now assume you are trying to heat 1 kg of liquid water at 25°C to saturated vapor at 100°C, but you want to do it in an oven that is at 80°C. This is obviously impossible...
ME-311: Thermodynamics I VerSteeg In-Class Example Problem Chapter 6 Example: Entropy Handling A rigid tank is...
ME-311: Thermodynamics I VerSteeg In-Class Example Problem Chapter 6 Example: Entropy Handling A rigid tank is divided into two equal parts by a partition. One part of the tank contains 2.5 kg of compressed water at 400 kPa and 60°C while the other part is evacuated. The partition is now removed, and the water expands to fill the entire tank, Determine: d) The entropy change of water during this process, if the final pressure in the tank is 40 kPa....
A rigid tank contains 2.0 kg saturated liquid water at 60 C, then 25 kJ of...
A rigid tank contains 2.0 kg saturated liquid water at 60 C, then 25 kJ of heat was added to it while being stirred with a paddle which resulted in adding 30 kJ of wok, what is the final internal energy (kJ) of the water?
(25 pts) A well-insulated and well-sealed 2-m x 3-m x 4-m room is initially at Tal...
(25 pts) A well-insulated and well-sealed 2-m x 3-m x 4-m room is initially at Tal = 22 °C and p = 100 kPa. A mass of mw = 20 kg of liquid water at Tw./ = 80 °C is brought into the room and the system is allowed to reach equilibrium conditions (state 2). 2m x 3m x 4m ROOM 22°C 100 kPa Specific heat values for the air and water may be taken as Cp,air = 1.005 kJ/kg-K;...
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...
Options A. 8.7250 kJ/K B. 4.4476 kJ/K C. -4.4475 kJ/K D. None of above 1 kg...
Options
A. 8.7250 kJ/K
B. 4.4476 kJ/K
C. -4.4475 kJ/K
D. None of above
1 kg of saturated liquid water at 10 bar is heated at constant pressure until it is! entirely converted to saturated vapour. What is the entropy change of the water for this process?
clear explanion of the problem please 1. A 0.3-dm3 glass of water at 22°C is to...
clear explanion of the problem
please
1. A 0.3-dm3 glass of water at 22°C is to be cooled with ice to 5°C. Determine how much ice needs to be added to the water, in grams, if the ice is at a) 0°C, b) -20°C. c) Also determine how much water would be needed if the cooling is to be done with cold water at 0°C. The melting temperature and the heat of fusion of ice at atmospheric pressure are 0°C...
A sealed rigid tank has 0.1 kg saturated vapor R-410a at 0°C that is cooled to...
A sealed rigid tank has 0.1 kg saturated vapor R-410a at 0°C that is cooled to 20°C by a 20°C heat sink. Thermodynamic properties of R410a at initial and final states are given as: u1 = 253.02 kJ/kg, 51 -1.0368 kJ/kg.k ; u2 - 136.5 kJ/kg; 52 - 0.5946 kJ/kg.K .. Find the heat transfer during the cooling process. b. Calculate the change in entropy of the R-410a c. Determine the change in entropy of heat sink, a. Estimate the...
In a variable volume container, 35 kg of water is heated from 75 °C to 250...
In a variable volume container, 35 kg of water is heated from 75 °C to 250 °C at a constant pressure of 5 bar. a. [4 pts] How much heat was added to the container? b. [8 pts] If the same amount of heat is instead added to 35 kg of water at 75 °C in a rigid container at a constant pressure of 5 bar, what would be the final temperature?
Problem 3 A rigid 6L-tank contains 3.3 kg of water initially at 30°C. The tank is heated to 175°C by a heat pump that receives heat from surroundings transfer to the water, (b) the change in entropy at 25°C. The process is reversible. Find (a) the heat
Problem 3 A rigid 6L-tank contains 3.3 kg of water initially at 30°C. The tank is heated to 175°C by a heat pump that receives heat from surroundings transfer to the water, (b)...
ME-311: Thermodynamics I VerSteeg In-Class Example Problem Chapter 6 Example: Entropy Handling A rigid tank is divided into two equal parts by a partition. One part of the tank contains 2.5 kg of compressed water at 400 kPa and 60°C while the other part is evacuated. The partition is now removed, and the water expands to fill the entire tank, Determine: d) The entropy change of water during this process, if the final pressure in the tank is 40 kPa....
(25 pts) A well-insulated and well-sealed 2-m x 3-m x 4-m room is initially at Tal = 22 °C and p = 100 kPa. A mass of mw = 20 kg of liquid water at Tw./ = 80 °C is brought into the room and the system is allowed to reach equilibrium conditions (state 2). 2m x 3m x 4m ROOM 22°C 100 kPa Specific heat values for the air and water may be taken as Cp,air = 1.005 kJ/kg-K;...
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...
Options
A. 8.7250 kJ/K
B. 4.4476 kJ/K
C. -4.4475 kJ/K
D. None of above
1 kg of saturated liquid water at 10 bar is heated at constant pressure until it is! entirely converted to saturated vapour. What is the entropy change of the water for this process?
clear explanion of the problem
please
1. A 0.3-dm3 glass of water at 22°C is to be cooled with ice to 5°C. Determine how much ice needs to be added to the water, in grams, if the ice is at a) 0°C, b) -20°C. c) Also determine how much water would be needed if the cooling is to be done with cold water at 0°C. The melting temperature and the heat of fusion of ice at atmospheric pressure are 0°C...
A sealed rigid tank has 0.1 kg saturated vapor R-410a at 0°C that is cooled to 20°C by a 20°C heat sink. Thermodynamic properties of R410a at initial and final states are given as: u1 = 253.02 kJ/kg, 51 -1.0368 kJ/kg.k ; u2 - 136.5 kJ/kg; 52 - 0.5946 kJ/kg.K .. Find the heat transfer during the cooling process. b. Calculate the change in entropy of the R-410a c. Determine the change in entropy of heat sink, a. Estimate the...
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