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1. A process has been proposed in which an ideal gas (Cp 30 kJ kmol K1)...
(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...
constant specife heats An ideal gas wit of cp .1 kJ/(kg K) and c 0.75 kJ/(kg...
constant specife heats An ideal gas wit of cp .1 kJ/(kg K) and c 0.75 kJ/(kg K) is contained in the piston-cylinder device shown. Initially, the vol- ume is 50 cm3 and the temperature is 20°C. How much heat must be added to double the volume if the final pressure and temperature are 400 kPa and 1000 K respectively. g·K) and Cu- Ideal gas Linear spring
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...
Consider a piston cylinder process in air (as an ideal gas with constant specific heats) which...
Consider a piston cylinder process in air (as an ideal gas with constant specific heats) which goes from state 1 at 1 atm, 300 K to state 2 at: 3 atm and 400K. (use k=1.4, Cp = 1.005 kJ/(kg K), Cv=0.718 kJ/(kg K), R= 0.287 kJ/(kg K)) (these are the same conditions as question 4). What must the heat transfer be (in kJ/kg), if the process takes place without entropy generation and it can be assumed the temperature at system...
2. Find the changes in internal energy (AU) and enthalpy (AH) per kmol, for air going...
2. Find the changes in internal energy (AU) and enthalpy (AH) per kmol, for air going from 10 bar, 277 K and 2.28 m3/kmol (molar volume), to 333 K and 1 atm. Use the following: 4 Cp = 29.3 kJ kmol-? K-1 Cy = 21 kJ kmol-? K-1 PV/T = constant Do not use any additional properties of ideal gases. There is no need to prove the gas is ideal or to use such properties. Hint: split the process up...
I. (30 pts.) One mole of an ideal gas with constant heat capacities and ? 5/3...
I. (30 pts.) One mole of an ideal gas with constant heat capacities and ? 5/3 is compressed adiabatically in a piston-cylinder device from T1-300 K, pi = 1 bar to p2 = 10 bar at a constant external pressure Pext"- P2 -10 bar. Calculate the final temperature, T2, and W, Q. AU, AH for this process. 2. (20 pts.) Repeat problem 1 for an adiabatic and reversible compression. 3. (20 pts.) A rigid, insulated tank is divided into two...
Participation Problem 6-4 Assuming ideal gas and constant Cp, calculate Δ S (in kJ/( from 200...
Participation Problem 6-4 Assuming ideal gas and constant Cp, calculate Δ S (in kJ/( from 200 K to 800 K while changing the pressure from 2000 kPa to 1000 kPa. kg.K)) for a process where nitrogen is heated Numeric Answer
A mixture of ideal gases has a specific heat ratio of k= 1.35 and an apparent...
A mixture of ideal gases has a specific heat ratio of k= 1.35 and an apparent molecular weight of M= 26 kg/kmol. Determine the work. in kJ/kg, required to compress this mixture isentropically in a closed system from 100 kPa and 35 C to 700 kPa. The universal gas constant is Ru 8.314 kJ/kmol-K Gas mixture k-1.35 100 kPa, 35°C The work required to compress this mixture is kJ/kg.
(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...
constant specife heats An ideal gas wit of cp .1 kJ/(kg K) and c 0.75 kJ/(kg K) is contained in the piston-cylinder device shown. Initially, the vol- ume is 50 cm3 and the temperature is 20°C. How much heat must be added to double the volume if the final pressure and temperature are 400 kPa and 1000 K respectively. g·K) and Cu- Ideal gas Linear spring
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...
Consider a piston cylinder process in air (as an ideal gas with constant specific heats) which goes from state 1 at 1 atm, 300 K to state 2 at: 3 atm and 400K. (use k=1.4, Cp = 1.005 kJ/(kg K), Cv=0.718 kJ/(kg K), R= 0.287 kJ/(kg K)) (these are the same conditions as question 4). What must the heat transfer be (in kJ/kg), if the process takes place without entropy generation and it can be assumed the temperature at system...
2. Find the changes in internal energy (AU) and enthalpy (AH) per kmol, for air going from 10 bar, 277 K and 2.28 m3/kmol (molar volume), to 333 K and 1 atm. Use the following: 4 Cp = 29.3 kJ kmol-? K-1 Cy = 21 kJ kmol-? K-1 PV/T = constant Do not use any additional properties of ideal gases. There is no need to prove the gas is ideal or to use such properties. Hint: split the process up...
I. (30 pts.) One mole of an ideal gas with constant heat capacities and ? 5/3 is compressed adiabatically in a piston-cylinder device from T1-300 K, pi = 1 bar to p2 = 10 bar at a constant external pressure Pext"- P2 -10 bar. Calculate the final temperature, T2, and W, Q. AU, AH for this process. 2. (20 pts.) Repeat problem 1 for an adiabatic and reversible compression. 3. (20 pts.) A rigid, insulated tank is divided into two...
Participation Problem 6-4 Assuming ideal gas and constant Cp, calculate Δ S (in kJ/( from 200 K to 800 K while changing the pressure from 2000 kPa to 1000 kPa. kg.K)) for a process where nitrogen is heated Numeric Answer
A mixture of ideal gases has a specific heat ratio of k= 1.35 and an apparent molecular weight of M= 26 kg/kmol. Determine the work. in kJ/kg, required to compress this mixture isentropically in a closed system from 100 kPa and 35 C to 700 kPa. The universal gas constant is Ru 8.314 kJ/kmol-K Gas mixture k-1.35 100 kPa, 35°C The work required to compress this mixture is kJ/kg.
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