Homework Answers
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Dr. Terror uses a heat engine like the one shown at the right. It has the...
High-temperature thermal reservoir Low-temperature thermal reservoir Dr. Terror uses a heat engine like the one shown...
High-temperature thermal reservoir Low-temperature thermal reservoir Dr. Terror uses a heat engine like the one shown at the right. It has the following operational parameters: 1. Tu = 1430.0 K 2. TL = 306 K 3. OH = 3620.0J 4. E = 12.9% (the efficiency of the engine) TH QH T Q Heat engine Part A: What is the work output (W) of the engine? W = J Part B: How much heat is exhausted (Q.) to the low-temperature reservoir?...
w High-temperature thermal reservoir Low-temperature thermal reservoir Dr. Terror uses a heat engine like the one...
w High-temperature thermal reservoir Low-temperature thermal reservoir Dr. Terror uses a heat engine like the one shown at the right. It has the following operational parameters: 1. T = 1430.0 K 2. TL = 336 K 3. OH = 3820.0J 4.€ = 12.9% (the efficiency of the engine) Heat engine Part A: What is the work output (W) of the engine? W = Part B: How much heat is exhausted (O) to the low-temperature reservoir? QL = Part C: What...
High-tempere thermal reservoir Low-temperature thermal reservo Dr. Terror uses a heat engine like the one shown...
High-tempere thermal reservoir Low-temperature thermal reservo Dr. Terror uses a heat engine like the one shown at the right. It has the following operational parameters: 1. T = 1430.0 K 2. TL = 336 K 3. On = 3620.0J 4. e = 10.9 % (the efficiency of the engine) Heat engine Part A: What is the work output (W) of the engine? W = Part B: How much heat is exhausted (Q.) to the low-temperature reservoir? OL- Part C: What...
High-temperature thermal reservoir Low-temperature thermal reservoir Dr. Terror uses a heat engine like the one shown...
High-temperature thermal reservoir Low-temperature thermal reservoir Dr. Terror uses a heat engine like the one shown at the right. It has the following operational parameters: 1. Ty = 1430.0K 2. Ti = 336 K 3. QH = 3620.01 4. e = 10.9% (the efficiency of the engine) TA Heat engine Part A: What is the work output (W) of the engine? W J Part B: How much heat is exhausted (L) to the low-temperature reservoir? OL. Part C: What is...
Part A For each engine calculate ?E = QH?Wout?QC, where QH is the amount of heat transferred...
Part A
For each engine calculate ?E
= QH?Wout?QC, where
QH is the amount of heat transferred from the hot
reservoir, QC is the amount of heat transferred to the
cold reservoir, Wout is the energy output of the heat
engine. QH, Wout, QC are positive
quantities.
?E(a), ?E(b), ?E(c) =
Part B
For each engine calculate the theoretical maximum efficiency
(Carnot efficiency) emax.
emax,(a), emax,(b), emax,(c) =
Part C
For each engine calculate the actual efficiency e.
e(a), e(b),...
Part A A heat engine is designed to do work. This is possible only if certain relationships between the heats and temp...
Part A A heat engine is designed to do work. This is possible only if certain relationships between the heats and temperatures at the input and output hold true. Which of the following sets of statements must apply for the heat engine to do work? A) Qh < Qc and Th < Tc B) Qh > Qc and Th < Tc C) Qh < Qc and Th > Tc D) Qh > Qc and Th > Tc Part B Find...
2. For a heat engine shown below, the low temperature in the cycle increases from 275...
2. For a heat engine shown below, the low temperature in the cycle increases from 275 to 285 K, while other temperatures (including the low temperature reservoir) and QH stay the same. What happens to the entropy change of the low-temperature reservoir? Explain for full credit hot reservoirTh500 K 1250. ー S,--2.50 JIK A. decreases QH1250. J B. increases TH 500 K C. does not change 0.43 Ws-538.J Tc 285K AStotal 0.09 J/K Qc -713. J ASc 2.59 J/K cold...
A reversible heat engine operates between a high temperature reservoir at Th and a low temperature...
A reversible heat engine operates between a high temperature reservoir at Th and a low temperature reservoir at Tư. The work produced by the heat engine is used to drive a reversible refrigerator that operates between the same two reservoirs. Determine if the low temperature reservoir is being cooled or heated. (30 points). High Temp. Reservoir @ TH QH ORH HE,H w net HE R QHEL Teru Low Temp. Reservoir @ TL
Learning Goal: To understand what a heat engine is and its theoretical limitations. Ever since Hero...
Learning Goal:
To understand what a heat engine is and its theoretical
limitations.
Ever since Hero demonstrated a crude steam turbine in ancient
Greece, humans have dreamed of converting heat into work. If a fire
can boil a pot and make the lid jump up and down, why can't heat be
made to do useful work?
A heat engine is a device designed to convert heat into work.
The heat engines we will study will be cyclic: The working
substance...
As shown in the figure, a reversible power cycle receives energy QH by heat transfer from...
As shown in the figure, a reversible power cycle receives energy
QH by heat transfer from a hot reservoir at TH and rejects energy
QC by heat transfer to a cold reservoir at TC.
a) If TH = 1600 K, TC = 400 K, what is the thermal
efficiency?
b) If TH = 500oC, TC = 20oC, and Wcycle = 1000 kJ, what are QH and
QC, each in kJ?
c) If ? = 60% and TC = 40oF, what...
High-temperature thermal reservoir Low-temperature thermal reservoir Dr. Terror uses a heat engine like the one shown at the right. It has the following operational parameters: 1. Tu = 1430.0 K 2. TL = 306 K 3. OH = 3620.0J 4. E = 12.9% (the efficiency of the engine) TH QH T Q Heat engine Part A: What is the work output (W) of the engine? W = J Part B: How much heat is exhausted (Q.) to the low-temperature reservoir?...
w High-temperature thermal reservoir Low-temperature thermal reservoir Dr. Terror uses a heat engine like the one shown at the right. It has the following operational parameters: 1. T = 1430.0 K 2. TL = 336 K 3. OH = 3820.0J 4.€ = 12.9% (the efficiency of the engine) Heat engine Part A: What is the work output (W) of the engine? W = Part B: How much heat is exhausted (O) to the low-temperature reservoir? QL = Part C: What...
High-tempere thermal reservoir Low-temperature thermal reservo Dr. Terror uses a heat engine like the one shown at the right. It has the following operational parameters: 1. T = 1430.0 K 2. TL = 336 K 3. On = 3620.0J 4. e = 10.9 % (the efficiency of the engine) Heat engine Part A: What is the work output (W) of the engine? W = Part B: How much heat is exhausted (Q.) to the low-temperature reservoir? OL- Part C: What...
High-temperature thermal reservoir Low-temperature thermal reservoir Dr. Terror uses a heat engine like the one shown at the right. It has the following operational parameters: 1. Ty = 1430.0K 2. Ti = 336 K 3. QH = 3620.01 4. e = 10.9% (the efficiency of the engine) TA Heat engine Part A: What is the work output (W) of the engine? W J Part B: How much heat is exhausted (L) to the low-temperature reservoir? OL. Part C: What is...
Part A
For each engine calculate ?E
= QH?Wout?QC, where
QH is the amount of heat transferred from the hot
reservoir, QC is the amount of heat transferred to the
cold reservoir, Wout is the energy output of the heat
engine. QH, Wout, QC are positive
quantities.
?E(a), ?E(b), ?E(c) =
Part B
For each engine calculate the theoretical maximum efficiency
(Carnot efficiency) emax.
emax,(a), emax,(b), emax,(c) =
Part C
For each engine calculate the actual efficiency e.
e(a), e(b),...
2. For a heat engine shown below, the low temperature in the cycle increases from 275 to 285 K, while other temperatures (including the low temperature reservoir) and QH stay the same. What happens to the entropy change of the low-temperature reservoir? Explain for full credit hot reservoirTh500 K 1250. ー S,--2.50 JIK A. decreases QH1250. J B. increases TH 500 K C. does not change 0.43 Ws-538.J Tc 285K AStotal 0.09 J/K Qc -713. J ASc 2.59 J/K cold...
A reversible heat engine operates between a high temperature reservoir at Th and a low temperature reservoir at Tư. The work produced by the heat engine is used to drive a reversible refrigerator that operates between the same two reservoirs. Determine if the low temperature reservoir is being cooled or heated. (30 points). High Temp. Reservoir @ TH QH ORH HE,H w net HE R QHEL Teru Low Temp. Reservoir @ TL
Learning Goal:
To understand what a heat engine is and its theoretical
limitations.
Ever since Hero demonstrated a crude steam turbine in ancient
Greece, humans have dreamed of converting heat into work. If a fire
can boil a pot and make the lid jump up and down, why can't heat be
made to do useful work?
A heat engine is a device designed to convert heat into work.
The heat engines we will study will be cyclic: The working
substance...
As shown in the figure, a reversible power cycle receives energy
QH by heat transfer from a hot reservoir at TH and rejects energy
QC by heat transfer to a cold reservoir at TC.
a) If TH = 1600 K, TC = 400 K, what is the thermal
efficiency?
b) If TH = 500oC, TC = 20oC, and Wcycle = 1000 kJ, what are QH and
QC, each in kJ?
c) If ? = 60% and TC = 40oF, what...
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