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OCH 5. An inventor has devised a complicated nonflow process in which 1 mol...
1. Close system example An inventor claims to have a "black box" which transforms 1 mol of air fr...
1. Close system example An inventor claims to have a "black box" which transforms 1 mol of air from 500K at 2 bar to 350K at 1 bar, generates 2000J of work and transfer an undetermined amount of heat to a heat reservoir at 300 K Determine if this process may be potentially possible assuming that air is an ideal gas with Cp 7/2R. Start by assessing AStotal - ASystem + ASurrounding
1. Close system example An inventor claims to...
Problem 2 (28%) An inventor has proposed to build a device to continuously create hot and...
Problem 2 (28%) An inventor has proposed to build a device to continuously create hot and cold air from a high pressure air stream at room temperature, shown in Figure 1. She claims that she can feed air at 25°C and 10 bar into this device and obtain cold air (0°C and 1 bar) and hot air (40°C and 1 bar). The device has no energy input, no moving parts, and loses no heat to the surroundings. Assume a constant...
Chemical Unive ChE Engineering Department 205: Given by Dr. M. K. Hadi-kali Time allowed: 2h This...
Chemical Unive ChE Engineering Department 205: Given by Dr. M. K. Hadi-kali Time allowed: 2h This final esam is closed book. Answer problems showint all the necessary steps) 2.One kg of air ul.-20 giaci -21 J mer Krois adia atically and reversibly fro bars and 120 C to 20 bars. calculate the final temperature and the work on joule) required process. Assume that air is an ideal gas. l 3. Calculate the molar volume and the compressibility factor of ethylene...
5. (30 pts) In a steady-state flow process carried out at atmosphere pressure, 2 mol/s of...
5. (30 pts) In a steady-state flow process carried out at atmosphere pressure, 2 mol/s of air at 600K is continuously mixed with 3 mol/s of air at 450 K. The product stream is at 400 K and at 1 atm. Assume the ideal-gas state for air with Cp=7/2 R, and that kinetic and potential-energy changes of the streams are negligible, and the surroundings are at 300 K. a) What is the rate of heat transfer? b) What is the...
(1) A process has been proposed whereby an ideal gas is taken from P=10 bar and...
(1) A process has been proposed whereby an ideal gas is taken from P=10 bar and T=300 K to P=1 bar and T=500K in a closed system. During the process the system performs 1,000 [J] of work and receives 6,430 [j] of heat from the surroundings at a constant temperature of 300 K. The constant pressure heat capacity of the gas Cp=30 [J/(mol K)]. Gas constant R=8.314 [J/(mol K)]. (a) (7 pts.) What is the change of molar internal energy...
(1) A process has been proposed whereby an ideal gas is taken from P=10 bar and...
(1) A process has been proposed whereby an ideal gas is taken from P=10 bar and T=300 K to P=1 bar and T=500K in a closed system. During the process the system performs 1,000 [j] of work and receives 6,430 [J] of heat from the surroundings at a constant temperature of 300 K. The constant pressure heat capacity of the gas cp=30 [J/mol K)]. Gas constant. R=8.314 [J/(mol K)]. (a) (7 pts.) What is the change of molar internal energy...
A process has been proposed whereby an ideal gas is taken from P=10 bar and T=300...
A process has been proposed whereby an ideal gas is taken from P=10 bar and T=300 K to P=1 bar and T=500K in a closed system. During the process the system performs 1,000 [J] of work and receives 6,430 [J] of heat from the surroundings at a constant temperature of 300 K. The constant pressure heat capacity of the gas cp=30 [J/(mol K)] . Gas constant R=8.314 [J/(mol K)]. (a) (7 pts.) What is the change of molar internal energy...
(45 pes) An inventor claims to have developed a steady flow device that operates on an electrical power input of 250 kW, has one inlet and two outlets. A stream of ammonia e device at 100 kPa and 20P...
(45 pes) An inventor claims to have developed a steady flow device that operates on an electrical power input of 250 kW, has one inlet and two outlets. A stream of ammonia e device at 100 kPa and 20PC at a rate of 1 kg/s. The two exiting streams ow rate, one is at 200 kPa, 20°C and the other is a saturated liquid at 10 aims that heat transfer occurs with an uniform surface temperature sume that kinetic and...
6.) A closed, rigid tank contains 5 kg of air initially at 300 K, 1 bar....
6.) A closed, rigid tank contains 5 kg of air initially at 300 K, 1 bar. The diagram below shows a tank in contact with a thermal reservoir at 600 K and heat transfer occurs at the boundary where the temperature is 600 K. A stirring rod transfers 600 kJ of energy to the air. The final temperature is 600 K. The air can be modeled as an ideal gas with c 0.733 k.J/kg K and kinetic and potential energy...
Refrigeration Question 1 a) A refrigerant R134a refrigerator is to maintain the refrigerated spac...
Refrigeration Question 1 a) A refrigerant R134a refrigerator is to maintain the refrigerated space at -100C. Would you recommended an evaporator pressure of 1.6 bar or 2 bar for this system? Why? -la An automotive Air conditioner using refrigerant R134a as the working fluid and operating on ideal vapor compression refrigerant cycle is to maintain a space at 24°C while operating its condenser at 1000 kPa. Determine the COP of the system when a temperature difference of 14°C is allowed...
1. Close system example An inventor claims to have a "black box" which transforms 1 mol of air from 500K at 2 bar to 350K at 1 bar, generates 2000J of work and transfer an undetermined amount of heat to a heat reservoir at 300 K Determine if this process may be potentially possible assuming that air is an ideal gas with Cp 7/2R. Start by assessing AStotal - ASystem + ASurrounding
1. Close system example An inventor claims to...
Problem 2 (28%) An inventor has proposed to build a device to continuously create hot and cold air from a high pressure air stream at room temperature, shown in Figure 1. She claims that she can feed air at 25°C and 10 bar into this device and obtain cold air (0°C and 1 bar) and hot air (40°C and 1 bar). The device has no energy input, no moving parts, and loses no heat to the surroundings. Assume a constant...
Chemical Unive ChE Engineering Department 205: Given by Dr. M. K. Hadi-kali Time allowed: 2h This final esam is closed book. Answer problems showint all the necessary steps) 2.One kg of air ul.-20 giaci -21 J mer Krois adia atically and reversibly fro bars and 120 C to 20 bars. calculate the final temperature and the work on joule) required process. Assume that air is an ideal gas. l 3. Calculate the molar volume and the compressibility factor of ethylene...
5. (30 pts) In a steady-state flow process carried out at atmosphere pressure, 2 mol/s of air at 600K is continuously mixed with 3 mol/s of air at 450 K. The product stream is at 400 K and at 1 atm. Assume the ideal-gas state for air with Cp=7/2 R, and that kinetic and potential-energy changes of the streams are negligible, and the surroundings are at 300 K. a) What is the rate of heat transfer? b) What is the...
(1) A process has been proposed whereby an ideal gas is taken from P=10 bar and T=300 K to P=1 bar and T=500K in a closed system. During the process the system performs 1,000 [J] of work and receives 6,430 [j] of heat from the surroundings at a constant temperature of 300 K. The constant pressure heat capacity of the gas Cp=30 [J/(mol K)]. Gas constant R=8.314 [J/(mol K)]. (a) (7 pts.) What is the change of molar internal energy...
(1) A process has been proposed whereby an ideal gas is taken from P=10 bar and T=300 K to P=1 bar and T=500K in a closed system. During the process the system performs 1,000 [j] of work and receives 6,430 [J] of heat from the surroundings at a constant temperature of 300 K. The constant pressure heat capacity of the gas cp=30 [J/mol K)]. Gas constant. R=8.314 [J/(mol K)]. (a) (7 pts.) What is the change of molar internal energy...
(45 pes) An inventor claims to have developed a steady flow device that operates on an electrical power input of 250 kW, has one inlet and two outlets. A stream of ammonia e device at 100 kPa and 20PC at a rate of 1 kg/s. The two exiting streams ow rate, one is at 200 kPa, 20°C and the other is a saturated liquid at 10 aims that heat transfer occurs with an uniform surface temperature sume that kinetic and...
6.) A closed, rigid tank contains 5 kg of air initially at 300 K, 1 bar. The diagram below shows a tank in contact with a thermal reservoir at 600 K and heat transfer occurs at the boundary where the temperature is 600 K. A stirring rod transfers 600 kJ of energy to the air. The final temperature is 600 K. The air can be modeled as an ideal gas with c 0.733 k.J/kg K and kinetic and potential energy...
Refrigeration Question 1 a) A refrigerant R134a refrigerator is to maintain the refrigerated space at -100C. Would you recommended an evaporator pressure of 1.6 bar or 2 bar for this system? Why? -la An automotive Air conditioner using refrigerant R134a as the working fluid and operating on ideal vapor compression refrigerant cycle is to maintain a space at 24°C while operating its condenser at 1000 kPa. Determine the COP of the system when a temperature difference of 14°C is allowed...
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