Homework Answers
Add Answer to:
Air as an idcal gas in a closed system undergoes a reversible process between temperatures of...
5. (15) A closed system undergoes a process where heat transfer is allowed along the system...
5. (15) A closed system undergoes a process where heat transfer is allowed along the system boundary at constant temperature. For each case below, determine whether the change in entropy of the system is positive, negative, zero, or indeterminate. Explain your answer. a. Internally reversible process with heat transfer from the system to the surroundings b. Internally reversible process with heat transfer to the system from the surroundings; Internally reversible and adiabatic process; c. d. Internal irreversibilities present with heat...
One mole of an ideal gas in a closed system undergoes a mechanically reversible adiabatic compression...
One mole of an ideal gas in a closed system undergoes a mechanically reversible adiabatic compression process and changes from V1= 0.05 m^3 and P1= 1 bar to P2= 12 bar. Calculate Q, W, ∆U, and ∆H of the process. If the process will become irreversible with 50% efficiency, calculate the W, Q, ∆U, and ∆H.
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.
6.50 m A closed, rigid tank contains 5 kg of air initially at 300 K, 1...
6.50 m A closed, rigid tank contains 5 kg of air initially at 300 K, 1 bar. As illustrated in Fig. P6.50, the tank is 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 cy = 0.733 kJ/kg . K...
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...
c) A closed system undergoes a process for which the system entropy is constant (S2 S)...
c) A closed system undergoes a process for which the system entropy is constant (S2 S) Must the process be internally reversible? Explain your answer. THERMODYNAMICS d) Saturated water vapor at 5 bar undergoes a process in a closed system to a final state of 10 bar and 200°C. Can the process occur adiabatically? Explain your answer.
4. Nitrogen in a piston/cylinder assembly undergoes an internally reversible compression between specified states through a...
4. Nitrogen in a piston/cylinder assembly undergoes an internally reversible compression between specified states through a polytropic process with n=1.30. Determine P, the work and heat transfer and entropy change during the process. The volume at state 1 is 0.5 m', the pressure at state 1 is 1. bar, and the temperature at state 1 is 20°C. The temperature at state 2 is 200°C. P2 - bar W = Q= AS _ kJ/K
1.08 mol of a monatomic ideal gas undergoes a cyclic process in a reversible engine, as...
1.08 mol of a monatomic ideal gas undergoes a cyclic process in
a reversible engine, as shown in the PV diagram. The gas is
initially at STP at point a. The curved path is an isotherm at T =
411 K, and the straight paths represent processes at constant
pressure or constant volume. Determine the heat added in process
c-a.
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...
Air contained in a piston-cylinder assembly, initially at 2 bar, 200 K, and a volume of 1 L, unde...
Air contained in a piston-cylinder assembly, initially at 2 bar, 200 K, and a volume of 1 L, undergoes a process to a final state where the pressure is 8 bar and the volume is 2 L During the process, the pressure-volume relationship is linear. Assuming the ideal gas model for the air, determine the work and heat transfer, each in kJ. 4.
Air contained in a piston-cylinder assembly, initially at 2 bar, 200 K, and a volume of 1...
5. (15) A closed system undergoes a process where heat transfer is allowed along the system boundary at constant temperature. For each case below, determine whether the change in entropy of the system is positive, negative, zero, or indeterminate. Explain your answer. a. Internally reversible process with heat transfer from the system to the surroundings b. Internally reversible process with heat transfer to the system from the surroundings; Internally reversible and adiabatic process; c. d. Internal irreversibilities present with heat...
6.50 m A closed, rigid tank contains 5 kg of air initially at 300 K, 1 bar. As illustrated in Fig. P6.50, the tank is 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 cy = 0.733 kJ/kg . K...
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...
c) A closed system undergoes a process for which the system entropy is constant (S2 S) Must the process be internally reversible? Explain your answer. THERMODYNAMICS d) Saturated water vapor at 5 bar undergoes a process in a closed system to a final state of 10 bar and 200°C. Can the process occur adiabatically? Explain your answer.
4. Nitrogen in a piston/cylinder assembly undergoes an internally reversible compression between specified states through a polytropic process with n=1.30. Determine P, the work and heat transfer and entropy change during the process. The volume at state 1 is 0.5 m', the pressure at state 1 is 1. bar, and the temperature at state 1 is 20°C. The temperature at state 2 is 200°C. P2 - bar W = Q= AS _ kJ/K
1.08 mol of a monatomic ideal gas undergoes a cyclic process in
a reversible engine, as shown in the PV diagram. The gas is
initially at STP at point a. The curved path is an isotherm at T =
411 K, and the straight paths represent processes at constant
pressure or constant volume. Determine the heat added in process
c-a.
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...
Air contained in a piston-cylinder assembly, initially at 2 bar, 200 K, and a volume of 1 L, undergoes a process to a final state where the pressure is 8 bar and the volume is 2 L During the process, the pressure-volume relationship is linear. Assuming the ideal gas model for the air, determine the work and heat transfer, each in kJ. 4.
Air contained in a piston-cylinder assembly, initially at 2 bar, 200 K, and a volume of 1...
Most questions answered within 3 hours.
-
A square current loop 5.4 cm on each side carries a 510 mA
current. The loop...
asked 2 hours ago -
What are five tips in conducting knowledge assessment/literature
review research? Each of these tips needs to...
asked 2 hours ago -
Antigen presenting cells link innate and adaptive immune
responses. In the theoretical scenario where phagosomes cannot...
asked 2 hours ago -
Dealing with conflict, in my opinion, is a skill and an art. I
believe that those...
asked 3 hours ago -
6. A long straight wire with circular cross section and radius
1.5 cm carries a 1.2...
asked 3 hours ago -
Deacon Corporation has provided the following financial data
from its balance sheet and income statement:
Year...
asked 4 hours ago -
List and discuss at least three variables from everyday life for
which you expect the variable ...
asked 4 hours ago -
A high-pass filter consists of a 1.60 μF capacitor in series
with a 125 Ω resistor....
asked 4 hours ago -
A newly developed artificial intelligence has trouble
distinguishing hand-written numbers from hand-written alphabets.
There are pictures...
asked 4 hours ago -
The carbonate ion CO3 2- has multiple resonance structures.
a. Draw them and assign the hybridization...
asked 4 hours ago -
In doing an allocation for a basket purchase
Use the individual costs and the total market...
asked 4 hours ago -
what were the social political and economic causes and impacts of
the late 19th century urban...
asked 4 hours ago