(a) A gas undergoes an irreversible adiabatic expansion. Is the entropy change of the gas +...
(a) A gas undergoes an irreversible adiabatic expansion. Is the entropy change of the gas + environment the same as for a reversible process that leads to the same final state for the gas+environment?
Choices: smaller, larger, the same, or it depends
(b) A gas undergoes a cycle described on a PV diagram. For a complete cycle, the entropy change of the gas and environment are:
Choices: positive for the environment but not necessarily zero for the gas, zero, negative, or positive as a whole and zero for the gas
Homework Answers
A) In irreversible process-- Second law of thermodynamics says that in an irreversible process the net entropy that is entropy of system plus surrounding always increases.
Hence-- correct answer is Larger
B) In any cyclic process the change in entropy of system is always zero although the entropy change of environment will be positive.
Add Answer to:
(a) A gas undergoes an irreversible adiabatic expansion. Is the
entropy change of the gas +...
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The net change in the entropy of the universe during an adiabatic, irreversible process is: a) positive b) negative c) zero d) the integral of dQ/T e) indeterminate
A gas sample undergoes a reversible isothermal expansion. The figure gives the change AS in entropy...
A gas sample undergoes a reversible isothermal expansion. The figure gives the change AS in entropy of the gas versus the final volume Vf of the gas. The scale of the vertical axis is set by ΔSs = 73.7 J/K. How many moles are in the sample? 0.8 1.6 2.4 3.2 4.0 Vy (m3)
Please give detailed explanation for final part. Thanks. Reversible adiabatic expansion of ideal gas (This question...
Please give detailed explanation for final part. Thanks.
Reversible adiabatic expansion of ideal gas (This question involves working through the final section of lecture 3) Explain why the first Law for an reversible adiabatic process gives AU = -PdV, and why this equation doesn't hold for the Joule expansion. Assuming that for an ideal gas U = CVT, prove that the First Law leads to the statement that PVY is constant in a reversible adiabatic process. A container of Helium...
An ideal gas undergoes a cycle consisting of the following mechanically reversible steps: An adiabatic compression...
An ideal gas undergoes a cycle consisting of the following mechanically reversible steps: An adiabatic compression from Pu V1, T1 to P2, V2, T2 An isobaric expansion from P2, V2, T2 to P3 P2, Vs, T3 - An adiabatic expansion from P3, Vs, Ts to Pa, V4, T4 - A constant-volume process from Pa, V4, T4 to Pi, VV4, T1 (a) Sketch this cycle on a PV diagram (b) Derive an equation that expresses the thermal efficiency (n) of this...
please solve all For any irreversible process the net entropy change is Infinite Negative - Positive...
please solve all
For any irreversible process the net entropy change is Infinite Negative - Positive Zero A system ..... Is a region of constant mass and only energy is allowed to cross the boundaries Has a mass transfer across its boundaries and the mass within the system is not constant None of the choices is correct Cannot transfer either energy or mass to or from the surroundings Is a specified region, not necessarily of constant volume, where transfer of...
Write expressions in terms of the temperature T1, T2, T3, and T4 for the entropy change in each s...
Write expressions in terms of the temperature T1, T2, T3, and T4 for the entropy change in each step of the following process for an ideal monatomic gas: a) Reversible adiabatic expansion from T1P1V to T2P2V' b) Irreversible heating at constant volume from T2P2V' to T3P3V' c) Reversible adiabatic compression from T3P3V' to T4P4V d) Irreversible cooling at constant volume from T4P4V to T1P1V. Prove that the total entropy change for the cycle is 0. Please provide explanation, work, and...
13.A monatomic ideal gas (N=9.1x1023), undergoes adiabatic expansion. During the expansion, the temperature of the gas...
13.A monatomic ideal gas (N=9.1x1023), undergoes adiabatic expansion. During the expansion, the temperature of the gas decreases from 800.0K to 500.OK. The initial volume of the gas is 0.10 m². a. What is the final volume and pressure of the gas, after expansion? b. What is the change in internal energy of the gas? C. Calculate the work associated with this process.
of surroundings and total when 050 mol 3. Calculate the change in the entropy the system,...
of surroundings and total when 050 mol 3. Calculate the change in the entropy the system, the , of N2 gas at 298K and 1.00 bar double its volume (a) in an isothermal reversible expansion (b) in an isothermal irreversible expansion against p O (o) in an adiabatic reversible expansion
One mole of an ideal gas undergoes a reversible adiabatic expansion from T_1, to T_2 while...
One mole of an ideal gas undergoes a reversible adiabatic expansion from T_1, to T_2 while tripling the volume of the gas. What is the relation between T_1 and T-2? T-2/3 < T_1<T_2 T_2/3 < T_1 < T-2 T_1= T_2 T_2<T_1 T_1 lessthanorequalto T_2/3 One mole of Ar gas undergoes the reversible transformation shown. Assuming Ar behaves ideally, which statement is true for step 2? Delta U= C_p DeltaT DeltaH < Delta U Delat S= c_p ln(T_c/T_B) W = etaRt...
Calculate the entropy change of the system for a reversible and irreversible isothermal compression of oxygen...
Calculate the entropy change of the system for a reversible and irreversible isothermal compression of oxygen gas. The initial pressure of the gas is 1 bar in a volume of 100 L. The final pressure of the gas is 10 bar and the temperature is 400 K.
A gas sample undergoes a reversible isothermal expansion. The figure gives the change AS in entropy of the gas versus the final volume Vf of the gas. The scale of the vertical axis is set by ΔSs = 73.7 J/K. How many moles are in the sample? 0.8 1.6 2.4 3.2 4.0 Vy (m3)
Please give detailed explanation for final part. Thanks.
Reversible adiabatic expansion of ideal gas (This question involves working through the final section of lecture 3) Explain why the first Law for an reversible adiabatic process gives AU = -PdV, and why this equation doesn't hold for the Joule expansion. Assuming that for an ideal gas U = CVT, prove that the First Law leads to the statement that PVY is constant in a reversible adiabatic process. A container of Helium...
An ideal gas undergoes a cycle consisting of the following mechanically reversible steps: An adiabatic compression from Pu V1, T1 to P2, V2, T2 An isobaric expansion from P2, V2, T2 to P3 P2, Vs, T3 - An adiabatic expansion from P3, Vs, Ts to Pa, V4, T4 - A constant-volume process from Pa, V4, T4 to Pi, VV4, T1 (a) Sketch this cycle on a PV diagram (b) Derive an equation that expresses the thermal efficiency (n) of this...
please solve all
For any irreversible process the net entropy change is Infinite Negative - Positive Zero A system ..... Is a region of constant mass and only energy is allowed to cross the boundaries Has a mass transfer across its boundaries and the mass within the system is not constant None of the choices is correct Cannot transfer either energy or mass to or from the surroundings Is a specified region, not necessarily of constant volume, where transfer of...
13.A monatomic ideal gas (N=9.1x1023), undergoes adiabatic expansion. During the expansion, the temperature of the gas decreases from 800.0K to 500.OK. The initial volume of the gas is 0.10 m². a. What is the final volume and pressure of the gas, after expansion? b. What is the change in internal energy of the gas? C. Calculate the work associated with this process.
of surroundings and total when 050 mol 3. Calculate the change in the entropy the system, the , of N2 gas at 298K and 1.00 bar double its volume (a) in an isothermal reversible expansion (b) in an isothermal irreversible expansion against p O (o) in an adiabatic reversible expansion
One mole of an ideal gas undergoes a reversible adiabatic expansion from T_1, to T_2 while tripling the volume of the gas. What is the relation between T_1 and T-2? T-2/3 < T_1<T_2 T_2/3 < T_1 < T-2 T_1= T_2 T_2<T_1 T_1 lessthanorequalto T_2/3 One mole of Ar gas undergoes the reversible transformation shown. Assuming Ar behaves ideally, which statement is true for step 2? Delta U= C_p DeltaT DeltaH < Delta U Delat S= c_p ln(T_c/T_B) W = etaRt...
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