Question

An experimentalist claims that, based on his measurements, a heat engine receives 300 Btu of heat...

An experimentalist claims that, based on his measurements, a heat engine receives 300 Btu of heat from a source at 900 R, converts 160 Btu of it to work, and rejects the rest as waste heat to a sink at 540 R. Are these measurements reasonable? Why? Draw a sketch showing the direction of work and of heat transfer between the heat engine and the high and low temperature reservoirs. If the heat engine were to operate reversibly between these same two reservoirs, drawing the same value of QH from the high-temperature reservoir, determine the change in entropy for each reservoir, and the change in entropy of the universe.

I only need help with the second part of the question. Determining the the change in entropy for each reservoir, and of the universe. and please draw a sketch if needed.

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A heat engine is assumed to operate on a Carnot cycle. It receives 600kJ heat from...
A heat engine is assumed to operate on a Carnot cycle. It receives 600kJ heat from a high temperature reservoir at 600oC and rejects heat to a low temperature reservoir at 20oC. a. Calculate the thermal efficiency of the cycle. b. What is QL? c. What is the net work produced by this cycle? d. Does this process violate Kelvin-Plank statement? Explain. e. An inventor claimed that he built a heat engine operating between the same reservoirs that give a...
The following heat engine operates between heat reservoirs at 750 K and 300 K, respectively, and...
The following heat engine operates between heat reservoirs at 750 K and 300 K, respectively, and produces power of 95,000 kW. (a) If the engine operates all reversible, calculate the η, QH, and QC. (b) In practice, due to the irreversibility, the efficiency η = 0.35. If QH, TH and TC remain the same, calculate the produced work, lost work Wlost, and total entropy generation (ΔS).
35. A heat engine receives heat in the amount of Qh= 775 kJ from a high...
35. A heat engine receives heat in the amount of Qh= 775 kJ from a high thermal reservoir and delivers Wnet= 210 kJ of work per cycle. Write an expression for the efficiency of the engine. What is the efficiency? Write an expression for the amount of energy required to be rejected into the low temperature reservoir. How much energy, in kilojoules, is rejected into the low temperature reservoir?
2) A heat engine operates between two fixed temperature reservoirs, TH = 127 0C, TC =...
2) A heat engine operates between two fixed temperature reservoirs, TH = 127 0C, TC = 7 0C. In each cycle 5 J are extracted from the hot reservoir and 4 J are deposited into the cold reservoir. [ 0 0C = 273 K] (a) How much work is performed by the engine per cycle ? (4) (b) What is the efficiency of the engine ? (4) (c) What is the entropy change of the hot reservoir during one cycle...
Consider a heat engine which does 500 MJ of work over a 3 hour period and...
Consider a heat engine which does 500 MJ of work over a 3 hour period and operates between a hot reservoir of Th = 1250°C and a cold reservoir of Tc = 30.0°C. The engine is ideal and therefore running at its maximum efficiency. Show that the efficiency is 80.0%? How much heat: Comes from the hot reservoir? Is added to the cold reservoir? What is the rate of entropy change of the hot reservoir? Comment, with reasons, on the...
Consider a heat engine which does 500 MJ of work over a 3 hour period and...
Consider a heat engine which does 500 MJ of work over a 3 hour period and operates between a hot reservoir of Th = 1250°C and a cold reservoir of Tc = 30.0°C. The engine is ideal and therefore running at its maximum efficiency. [4 marks] Show that the efficiency is 80.0%? [6 marks] How much heat: Comes from the hot reservoir? Is added to the cold reservoir? [5 marks] What is the rate of entropy change of the hot...
Q4 (20 marks). Consider a heat engine which does 500 MJ of work over a 3...
Q4 . Consider a heat engine which does 500 MJ of work over a 3 hour period and operates between a hot reservoir of Th = 1250 C and a cold reservoir of Tc = 30.0 C. The engine is ideal and therefore running at its maximum efficiency. a) [4 marks] Show that the efficiency is 80.0%? b) [6 marks] How much heat: a. Comes from the hot reservoir? b. Is added to the cold reservoir? c) [5 marks] What...
A heat engine, based on diatomic molecules, can be made based on just 2 processes.  Suppose the...
A heat engine, based on diatomic molecules, can be made based on just 2 processes.  Suppose the cycle begins at a pressure of 3 atm and a volume of 0.01 m3.  It moves on the PV diagram following a straight line until it doubles in volume. Then it returns to the starting point following an isothermal path.  If there is 0.5 moles of gas, fill in the state table and the process table.  Now, which of the following temperatures would work as the hot...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT