Homework Answers
Add Answer to:
Consider air in a cylinder, initially at temperature 20°C. Assume 5 degrees of freedom (per molecule)...
Problem 7-173- A piston–cylinder device contains air that undergoes a reversible thermodynamic cycle. Initially, air is...
Problem 7-173- A piston–cylinder device contains air that undergoes a reversible thermodynamic cycle. Initially, air is at 400 kPa and 300 K with a volume of 0.3 m3. Air is first expanded isothermally to 150 kPa, then compressed adiabatically to the initial pressure, and finally compressed at the constant pressure to the initial state. Accounting for the variation of specific heats with temperature, determine the work and heat transfer for each process.
Air within a piston–cylinder assembly, initially at 15 lbf/ in.2, 510°R, and a volume of 6...
Air within a piston–cylinder assembly, initially at 15 lbf/ in.2, 510°R, and a volume of 6 ft3, is compressed isentropically to a final volume of 3 ft3. Assuming the ideal gas model with k = 1.4 for the air, determine the: (a) mass, in lb. (b) final pressure, in lbf/in.2 (c) final temperature, in °R. (d) work, in Btu.
A piston–cylinder assembly contains ammonia, initially at a temperature of -20°C and a quality of 40%....
A piston–cylinder assembly contains ammonia, initially at a temperature of -20°C and a quality of 40%. The ammonia is slowly heated to a final state where the pressure is 6 bar and the temperature is 100°C. While the ammonia is heated, its pressure varies linearly with specific volume. For the ammonia, determine the work and heat transfer, each in kJ/kg.
A piston-cylinder assembly contains ammonia, initially at a temperature of -20°C and a quality of 70%....
A piston-cylinder assembly contains ammonia, initially at a temperature of -20°C and a quality of 70%. The ammonia is slowly heated to a final state where the pressure is 6 bar and the temperature is 160°C. While the ammonia is heated, its pressure varies linearly with specific volume. For the ammonia, determine the work and heat transfer, each in kJ/kg.
5. Air expands isothermally constant temperature) in a closed, piston-cylinder device. The original state is given...
5. Air expands isothermally constant temperature) in a closed, piston-cylinder device. The original state is given by pı = 20 MPa, T = 1000 K. the process continues until the pressure drops to 2 MPa. The original volume of the air is V1 = 1 m². Determine the following: a. the mass of the air in the system, in kg. b. the final density of the air, in kg/m". Remember, Rair = 0.287 kJ/kg-K c. the final volume of the...
One mole of an ideal diatomic gas (with y = 1.4) is initially at a temperature,...
One mole of an ideal diatomic gas (with y = 1.4) is initially at a temperature, pressure, and volume of 0°C, 100 atm, and 0.224 liters, respectively. It is allowed to expand adiabatically until its final pressure is reduced to 10 atm. What is the final temperature? O degrees Celsius. - 132 degrees Celsius. - 17 degrees Celsius 142 degrees Celsius.
In an internal combustion engine, air at atmospheric pressure and temperature of 20⁰ C is compressed...
In an internal combustion engine, air at atmospheric pressure and temperature of 20⁰ C is compressed to 1/10 of its original volume. Calculate the final temperature when the pressure reaches 40 atmospheres.
1. Air in a cylinder with a volume of 500 cm3 is compressed by a piston...
1. Air in a cylinder with a volume of 500 cm3 is compressed by a piston to a volume of 150 cm3. If the initial air pressure is 5 x 104 Pa (N/m2), what is the pressure in the cylinder after compression? (Assume that this is a slow process, and that T remains constant.) 8. The sample of gas in Question 2 is contained in a rigid closed container. If the pressure of the gas is 1013 mb at 20°C, what...
1/2 Question 3 A piston-cylinder assembly fitted with a paddle wheel contains air, initially at 38°C,...
1/2 Question 3 A piston-cylinder assembly fitted with a paddle wheel contains air, initially at 38°C, 125 kPa, and a volume of 0.02 mº. Energy in the amount of 1.8 kJ is transferred to the air by the paddle wheel. The volume of the air in the piston-cylinder increases to 0.05 mº at constant pressure. If the heat transfer between the air and its surroundings can be ignored, determine (a) the mass of the air in the piston-cylinder (b) the...
A piston–cylinder device initially contains air at 150 kPa and 27 °C. In this state, the...
A piston–cylinder device initially contains air at 150 kPa and 27 °C. In this state, the piston is resting on a pair of stops, and the enclosed volume is 400 litres. The mass of the piston is such that a 200 kPa pressure is required to move it. The air is now heated until its volume has doubled. Sketch the process on a P-V diagram and determine (a) the mass of air and the final temperature, (b) the work done...
A piston-cylinder assembly contains ammonia, initially at a temperature of -20°C and a quality of 70%. The ammonia is slowly heated to a final state where the pressure is 6 bar and the temperature is 160°C. While the ammonia is heated, its pressure varies linearly with specific volume. For the ammonia, determine the work and heat transfer, each in kJ/kg.
5. Air expands isothermally constant temperature) in a closed, piston-cylinder device. The original state is given by pı = 20 MPa, T = 1000 K. the process continues until the pressure drops to 2 MPa. The original volume of the air is V1 = 1 m². Determine the following: a. the mass of the air in the system, in kg. b. the final density of the air, in kg/m". Remember, Rair = 0.287 kJ/kg-K c. the final volume of the...
One mole of an ideal diatomic gas (with y = 1.4) is initially at a temperature, pressure, and volume of 0°C, 100 atm, and 0.224 liters, respectively. It is allowed to expand adiabatically until its final pressure is reduced to 10 atm. What is the final temperature? O degrees Celsius. - 132 degrees Celsius. - 17 degrees Celsius 142 degrees Celsius.
1/2 Question 3 A piston-cylinder assembly fitted with a paddle wheel contains air, initially at 38°C, 125 kPa, and a volume of 0.02 mº. Energy in the amount of 1.8 kJ is transferred to the air by the paddle wheel. The volume of the air in the piston-cylinder increases to 0.05 mº at constant pressure. If the heat transfer between the air and its surroundings can be ignored, determine (a) the mass of the air in the piston-cylinder (b) the...
Most questions answered within 3 hours.
-
I create an address book where the user enters the name, phone
and email in the...
asked 4 minutes ago -
The production capacity for acrylonitrile
(C3H3N) in the United States exceeds 2
million pounds per year....
asked 11 minutes ago -
explain and comment out your answer
43. How many address lines are required to address a...
asked 18 minutes ago -
A sample of 45 observations is selected from a normal
population. The sample mean is 49,...
asked 32 minutes ago -
A construction company is planning to bid on a building
contract. The bid costs the company...
asked 30 minutes ago -
A firm operating in a purely competitive environment is faced
with a market price of $250....
asked 36 minutes ago -
•Let’s say someone claims the average population size is
600 feet squared and the housing authority...
asked 44 minutes ago -
Cynaide is a deadly poison that blocks the last step in the
electron transport chain of...
asked 48 minutes ago -
Your friend tells you that there is a vending machine on campus
that dispenses M&M packs...
asked 1 hour ago -
What advantages are there to using piperidine rather than
hydroxide as a base?
asked 1 hour ago -
7. The life of a Freeze Breeze electric fan is normally
distributed with a mean 4...
asked 1 hour ago -
1. A 751 mL NaCl solution is diluted to a volume of 1.06 L and a...
asked 1 hour ago