Homework Answers
![Now & Enthalpy change for the process is given by; DH= npat DH = 1.866 X109? yg x 29.11 KJ x (107.87 – 291.97% Hogy TOH= lok]](http://img.homeworklib.com/questions/dccbdcc0-545b-11eb-b385-dd0dee3eb017.png?x-oss-process=image/resize,w_560)
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Problem 2.5 Constant Pressure Process Air is compressed from 0.092 m3 to 0.034 m’ at a...
A quantity of a certain perfect gas is compressed from an initial state of 0.085 m3,...
A quantity of a certain perfect gas is compressed from an initial state of 0.085 m3, 1 bar to a final state of 0.034 m3, 3.9 bar. The specific heat at constant volume is 0.724 kJ/kg×K, and the specific heat at constant pressure is 1.020 kJ/kg×K. The observed temperature rise is 146K. Calculate the specific gas constant, R, the mass of gas present, and the internal energy of the gas.
0.20 kg of air at pressure of 113 kPa occupies 0.18 m3 and from this condition...
0.20 kg of air at pressure of 113 kPa occupies 0.18 m3 and from this condition it is compressed to 1237 kPa accordingly to the law P*(V)1.28 = constant. Determine change of internal energy of the air in kJ, Cp=1.005 kJ/kg K Cv=0.718kJ/kg K R=0.287 kJ/kg K
Process Design & Control Consider the process of filling a tank with compressed air from a constant pressure sup...
Process Design & Control
Consider the process of filling a tank with compressed
air from a constant pressure supply.
Consider the process of filling a tank with compressed air from a constant pressure supply The tank has a volume of 500 ft' and initially is at atmospheric pressure and 75°F. The tank is connected to a high pressure air line that contains a control valve. The valve is quickly opened when the filling process begins, and the flow rate of...
In an Otto cycle air is compressed from an initial pressure 120 kPa and temperature 370...
In an Otto cycle air is compressed from an initial pressure 120 kPa and temperature 370 T (K). The cycle has compression ratio of 10. In the constant volume heat addition process 1000 kJ/kg heat is added into the air. Considering variation on the specific heat of air with temperature, determine, (a) the pressure and temperature at the end of heat addition process (show the points on P-v diagram) (b) the network output (c) the thermal efficiency (d) the mean...
A gas is compressed from 600 cm3 to 200cm3 at a constant pressure of 400 kPa...
A gas is compressed from 600 cm3 to 200cm3 at a constant pressure of 400 kPa . At the same time, 100 J of heat energy is transferred out of the gas. What is the change in thermal energy of the gas during this process? Express your answer with the appropriate units.
1. A gas is compressed slowly at a constant pressure of 150 kPa from an initial...
1. A gas is compressed slowly at a constant pressure of 150 kPa from an initial volume of 700 L to a final volume of 100 L. How much work is done by the gas in this process? Explanation: this constant pressure process is possible for a gas that is cooling off Hint: carefully consider the sign of your answer, the definition of work, and the force vectors Draw the picture to help understand it Answer: absolute value of the...
8. A container filled with air (0.0177kg), held at constant pressure (152.OkPa), is compressed from 10.0L...
8. A container filled with air (0.0177kg), held at constant pressure (152.OkPa), is compressed from 10.0L to 5.0L. Note: The average mass of an air molecule is 4.84x10-26kg. a. What is the initial and final temperature of the gas, before/after the compression? b. Calculate the work output by the gas. C. Calculate Q for this process.
A gas is compressed from 600 cm to 200 cm at a constant pressure of 450...
A gas is compressed from 600 cm to 200 cm at a constant pressure of 450 kPa. At the same time, 100 J of heat energy is transferred out of the gas You may want to review (Pages 524-525) For general problem-solving tips and strategies for this topic, you may want to view a Video Tutor Solution of Fire piston. Part A What is the change in thermal energy of the gas during this process? Express your answer with the...
The figure shows a Carnot cycle. Starting from (a), the gas is compressed at constant temperature...
The figure shows a Carnot cycle. Starting from (a), the gas is compressed at constant temperature to (b), is compressed adiabatically to (c), is expanded at constant temperature to (d), and expanded adiabatically back to (a). The engine works between the temperatures Tc = 293 K and Th=430 K. The engine starts at (a) with a volume of 2.7 Land atmospheric pressure, 1.01 X 105 Pa. Assume this is a diatomic ideal gas (air, to a good approximation). What is...
Propane is compressed from an initial state with a pressure of 100 lbf/in2 and a quality...
Propane is compressed from an initial state with a pressure of 100 lbf/in2 and a quality of 0.40 to a final saturated liquid state with a temperature is 50°F. Is it possible for this process to occur adiabatically? Justify your answer. Air is contained in a rigid, well-insulated container of volume 3 m3. The air undergoes a process from an initial state with a pressure of 200 kPa and temperature of 300 K. During the process, the air receives 720...
Process Design & Control
Consider the process of filling a tank with compressed
air from a constant pressure supply.
Consider the process of filling a tank with compressed air from a constant pressure supply The tank has a volume of 500 ft' and initially is at atmospheric pressure and 75°F. The tank is connected to a high pressure air line that contains a control valve. The valve is quickly opened when the filling process begins, and the flow rate of...
1. A gas is compressed slowly at a constant pressure of 150 kPa from an initial volume of 700 L to a final volume of 100 L. How much work is done by the gas in this process? Explanation: this constant pressure process is possible for a gas that is cooling off Hint: carefully consider the sign of your answer, the definition of work, and the force vectors Draw the picture to help understand it Answer: absolute value of the...
8. A container filled with air (0.0177kg), held at constant pressure (152.OkPa), is compressed from 10.0L to 5.0L. Note: The average mass of an air molecule is 4.84x10-26kg. a. What is the initial and final temperature of the gas, before/after the compression? b. Calculate the work output by the gas. C. Calculate Q for this process.
A gas is compressed from 600 cm to 200 cm at a constant pressure of 450 kPa. At the same time, 100 J of heat energy is transferred out of the gas You may want to review (Pages 524-525) For general problem-solving tips and strategies for this topic, you may want to view a Video Tutor Solution of Fire piston. Part A What is the change in thermal energy of the gas during this process? Express your answer with the...
The figure shows a Carnot cycle. Starting from (a), the gas is compressed at constant temperature to (b), is compressed adiabatically to (c), is expanded at constant temperature to (d), and expanded adiabatically back to (a). The engine works between the temperatures Tc = 293 K and Th=430 K. The engine starts at (a) with a volume of 2.7 Land atmospheric pressure, 1.01 X 105 Pa. Assume this is a diatomic ideal gas (air, to a good approximation). What is...
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