Which of the following statements about pressure-volume work is true? The reversible process provides the maximum amou...
- Which of the following statements about pressure-volume work is
true?
- The reversible process provides the maximum amount of work.
- Work done at constant-pressure is zero.
- When work is done on the system in an adiabatic process there is a decrease in the internal energy of the system.
- Changes in pressure-volume work must always be offset by changes in the heat of the system.
- A free expansion takes place against a constant external pressure of 1 bar.
Homework Answers
Option (a) seems correct that is the reversible process provides the maximum amount of work done.
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Which of the following statements about pressure-volume work is true? The reversible process provides the maximum amou...
Assume there's 1 mol ideal mono-atomic gas in a 22.4L container at 300K. The initial entropy...
Assume there's 1 mol ideal mono-atomic gas in a 22.4L container
at 300K. The initial entropy of the system is 100J/K. For the
following processes, calculate:
a) q and w for a reversible expansion to twice the volume,
isothermally.
b)
S and
G for irreversible isothermal expansion against a constant 0.5 bar
external pressure, to a final internal pressure of 0.5 bar.
c)
U and
H for adiabatic reversible expansion to twice the volume.
5. Find the quasi-static (reversible) work done and the net heat absorbed by the system40.00 in...
5. Find the quasi-static (reversible) work done and the net heat absorbed by the system40.00 in each of the following three processes, all of which take the system from state A to state B Please refer to the diagram on the right. The blue curve and the equation that refers to it are for an adiabatic process. a is a constant. 2.63. a) The system is expanded from its original to its final volume heat being added to maintain the...
A polytropic process for an ideal gas in one in which pressure and volume are related...
A polytropic process for an ideal gas in one in which pressure and volume are related by = const., where n is a constant. It is a generalization of the special processes considered earlier. Thus n = 0 defines an isobaric process, n = cp/cv an adiabatic process, n = 1 an isothermal process, and n = 8 an isochoric process. Suppose 1 kg of dry air at 280 K and 100 kPa undergoes a polytropic expansion in which the...
Consider a reversible adiabatic expansion of 1.00 mol of an ideal gas, starting from 1.90 L...
Consider a reversible adiabatic expansion of 1.00 mol of an ideal gas, starting from 1.90 L and 415 K , if 2.0 kJ of work is done by the expansion. The molar heat capacity at constant volume of the gas is 2.5R. R = 8.314 JK−1mol−1. Determine the final temperature of the gas in the process. Determine the final volume of the gas in the process. Determine the final pressure of the gas in the process.
3.1 moles of ideal gas undergo an expansion from V1 = 1.2 m3 to V2 =...
3.1 moles of ideal gas undergo an expansion from V1 = 1.2 m3 to V2 = 1.7 m3 during an isothermal process taking place at T = 25 degree C. Calculate Delta U, Delta H, Q, W when The expansion takes place in The following conditions: A reversible expansion. A rapid non-reversible expansion against a constant surrounding pressure equal to The final pressure of The gas. A free expansion where The gas expands in vacuum against zero external pressure.
2 140 pt) Reversible Adiabatic Expansion of Nitrogen. Nitrogen expands reversibly in an insulated cylinder fitted...
2 140 pt) Reversible Adiabatic Expansion of Nitrogen. Nitrogen expands reversibly in an insulated cylinder fitted with a piston. The N2 is initially at 500K and 5 bar pressure and expands to a final pressure of 1 bar. Determine the final temperature T of the N2 (in K) as well as the work done in the process W (mol), assuming N2 to be in the ideal gas state. Heat capacity, Cp is equal to a constant at 3.560R.
Consider a reversible isothermal expansion of a gas at temperature τ from volume V to volume...
Consider a reversible isothermal expansion of a gas at temperature τ from volume V to volume V + ∆V . This is not a monatomic ideal gas, but the internal energy of the gas is given by U(τ, V ) = a*V* τ^ 4 , where a is a constant. The pressure is p = (1/3 U)/V . (a) What is the change of energy of the gas in the expansion? (b) How much work is done on the gas...
One mole of an ideal monatomic gas is taken through the reversible cycle shown in the figure Volu...
One mole of an ideal monatomic gas is taken through the reversible cycle shown in the figure Volume Process B-C is an adiabatic expansion with PB-13.0 atm and V-4.00x103 m3. The volume at State C is 9.00Vg. Process A-B occurs at constant volume, and Process C A occurs at constant pressure. What is the energy added to the gas as heat for the cycle? Submit Answer Tries 0/10 What is the energy leaving the gas as heat? Submit Answer Tries...
Part A An ideal gas expands through an adiabatic process. Which of the following statements is/are true? Check all that...
Part A An ideal gas expands through an adiabatic process. Which of the following statements is/are true? Check all that apply. Check all that apply. The work done by the gas is negative, and heat must be added to the system. The work done by the gas is positive, and no heat exchange occurs. The internal energy of the system has increased. The internal energy of the system has decreased. SubmitHintsMy AnswersGive UpReview Part Incorrect; Try Again; 5 attempts remaining...
3. An ideal gas is initially at a certain pressure and volume. It expands until its volume is four times the initial volume. This is done through an isobaric, an isothermal, and an adiabatic proce...
3. An ideal gas is initially at a certain pressure and volume. It expands until its volume is four times the initial volume. This is done through an isobaric, an isothermal, and an adiabatic process, respectively. During which of the processes a) ...is the work done by the gas greatest? b)... is the smallest amount of work done by the gas? c) does the internal energy increase? d) ...does the internal energy decrease? e)... does the largest amount of heat...
Assume there's 1 mol ideal mono-atomic gas in a 22.4L container
at 300K. The initial entropy of the system is 100J/K. For the
following processes, calculate:
a) q and w for a reversible expansion to twice the volume,
isothermally.
b)
S and
G for irreversible isothermal expansion against a constant 0.5 bar
external pressure, to a final internal pressure of 0.5 bar.
c)
U and
H for adiabatic reversible expansion to twice the volume.
5. Find the quasi-static (reversible) work done and the net heat absorbed by the system40.00 in each of the following three processes, all of which take the system from state A to state B Please refer to the diagram on the right. The blue curve and the equation that refers to it are for an adiabatic process. a is a constant. 2.63. a) The system is expanded from its original to its final volume heat being added to maintain the...
3.1 moles of ideal gas undergo an expansion from V1 = 1.2 m3 to V2 = 1.7 m3 during an isothermal process taking place at T = 25 degree C. Calculate Delta U, Delta H, Q, W when The expansion takes place in The following conditions: A reversible expansion. A rapid non-reversible expansion against a constant surrounding pressure equal to The final pressure of The gas. A free expansion where The gas expands in vacuum against zero external pressure.
2 140 pt) Reversible Adiabatic Expansion of Nitrogen. Nitrogen expands reversibly in an insulated cylinder fitted with a piston. The N2 is initially at 500K and 5 bar pressure and expands to a final pressure of 1 bar. Determine the final temperature T of the N2 (in K) as well as the work done in the process W (mol), assuming N2 to be in the ideal gas state. Heat capacity, Cp is equal to a constant at 3.560R.
One mole of an ideal monatomic gas is taken through the reversible cycle shown in the figure Volume Process B-C is an adiabatic expansion with PB-13.0 atm and V-4.00x103 m3. The volume at State C is 9.00Vg. Process A-B occurs at constant volume, and Process C A occurs at constant pressure. What is the energy added to the gas as heat for the cycle? Submit Answer Tries 0/10 What is the energy leaving the gas as heat? Submit Answer Tries...
3. An ideal gas is initially at a certain pressure and volume. It expands until its volume is four times the initial volume. This is done through an isobaric, an isothermal, and an adiabatic process, respectively. During which of the processes a) ...is the work done by the gas greatest? b)... is the smallest amount of work done by the gas? c) does the internal energy increase? d) ...does the internal energy decrease? e)... does the largest amount of heat...
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