3. (20 pts) In the Carnot engine (refer to the figure in question 2), an ideal...
3. (20 pts) In the Carnot engine (refer to the figure in question 2), an ideal gas undergoes a cycle of isothermal expansion (A → B), adiabatic expansion (B → C), isothermal compression (C → D), and adiabatic compression (D → A). All processes are assumed to be reversible. The volumes at the points are given that 2VA=VB and VC=2VD. Th is 650 °C and Tc is 30 °C. (1)
Calculate the amount of heat added to one mole gas in the engine (isothermal expansion process).
(2) Calculate the amount of heat removed from one mole gas in the engine (isothermal compression process).
(3) Calculate the thermal efficiency of this engine.
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3. (20 pts) In the Carnot engine (refer to the figure in
question 2), an ideal...
1. A crackpot inventor designs the following heat engine. (An annotated PV plot might help.) Step...
1. A crackpot inventor designs the following heat engine. (An annotated PV plot might help.) Step D: Starting at State A (PA, VA, and TA25.0 °C), the gas undergoes a reversible and isothermal expansion until it reaches State B (PB = 1.000 atm, VB, and TB). Step : A dry ice / acetone bath is used to isochorically bring the gas to State C (Pc, Vc, and Tc -78.5 °C) Step : The gas undergoes a reversible adiabatic compression until...
An ideal gas (1.82 moles) undergoes the following reversible Carnot cycle. (1) An isothermal expansion at...
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4. The pressure-volume diagram below shows a special reversible cycle called the Carnot cycle A mole...
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Consider a Carnot cycle in which the working substance is 0.10 mol of perfect gas molecules,...
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Answer Description The Carnot cycle attempts to model the most efficient possible process by avoiding what?...
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1. A crackpot inventor designs the following heat engine. (An annotated PV plot might help.) Step D: Starting at State A (PA, VA, and TA25.0 °C), the gas undergoes a reversible and isothermal expansion until it reaches State B (PB = 1.000 atm, VB, and TB). Step : A dry ice / acetone bath is used to isochorically bring the gas to State C (Pc, Vc, and Tc -78.5 °C) Step : The gas undergoes a reversible adiabatic compression until...
4. The pressure-volume diagram below shows a special reversible cycle called the Carnot cycle A mole of an ideal gas starts off in state 1 in contact with a large thermal reservoir at temperature Th. The gas then undergoes an isothermal expansion from Vi to V2. Upon reaching state 2, the gas container is removed from contact with the thermal reservoir and covered with thermal insulation. Next the gas is allowed to expand adiabatically from V2to Vs. Because the expansion...
8. A refrigerator may be regarded as the inverse of a steam engine, in that work is performed in order to remove heat from a system. It may be regarded as a steam engine run in reverse (i.e. the first step is a reversible adiabatic expansion from Th to Tc.) Heat is removed from the gas at the lower temperature in the succeeding isothermal expansion. The efficiency of a refrigerator is: Er = Aqoutput /Awinput Assuming a refrigerator can be...
Consider a Carnot cycle in which the working substance is 0.10 mol of perfect gas molecules, the temperature of the hot source is 373 K, that of the cold sink is 273 K; the initial volume of gas is 1.00 dm', which doubles over the course of the first isothermal stage. For the reversible adiabatic stages it may be assumed that VT3/2 = constant. a) calculate the volume of the gas VB and Vc); b) calculate the volume of the...
8. A refrigerator may be regarded as the inverse of a steam engine, in that work is performed in order to remove heat from a system. It may be regarded as a steam engine run in reverse (i.e. the first step is a reversible adiabatic expansion from Th to Tc.) Heat is removed from the gas at the lower temperature in the succeeding isothermal expansion. The efficiency of a refrigerator is: Er = Aqoutput/AWinput Assuming a refrigerator can be built...
T9D.3 In this problem, you will calculate the efficiency of a Carnot engine without referring to entropy (a) Consider the isothermal expansion in step 1 of the Car- not cycle. Because the temperature of the gas remains constant, work energy that flows out of the gas as it expands must be balanced by the heat energy flowing into the gas. Use this and equation T7.10 for the work done in an isothermal expansion to show that (T9.16) (b) In a...
12. 1 mole of an ideal gas undergoes an isothermal expansion from V1 = 1.4L followed by isobaric compression, p = cst.if P1 = 4.4atm, p2 = 1.7atm → ?- m calculate the work done by gas during the expansion. Express work in J = N·m! • For isothermal processes, AT = 0 T = cst → w=faw=fr&v=/MRT AV 594 Show your work like: `x-int_0^5 v(t)dt rarr x-int_0^5(-4*t)dt=-50 m 13. 1 mole of an ideal gas undergoes an isothermal expansion...
Answer Description The Carnot cycle attempts to model the most efficient possible process by avoiding what? 1. Adiabatic processes 2. Isothermal processes 3. Irreversible processes 4. Reversible processes For the Carnot cycle, in what type of process is heat added or removed? 1. Adiabatic 2. Isobaric 3. Isochoric 4. Isothermal Which statement is true? 1. n carnot < nactual 2. n Carnot = nactual 3. n carnot > nactual D. A heat engine takes from heat from a reservoir at...
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