Problem 18.46 An engine receives 790J of heat from a hot reservoir and gives off 450J...

Question

Question

Problem 18.46 An engine receives 790J of heat from a hot reservoir and gives off 450J...

Problem 18.46

An engine receives 790J of heat from a hot reservoir and gives off 450J of heat to a cold reservoir.

Part A

What is the work done?

ANSWER:

W =

J

Part B

What is the efficiency of this engine?

ANSWER:

e =

science physics

Add a comment Improve this question Transcribed image text

Answer 1

Answer #1

PART-1

W =Qh-Qc

W=790-450

W=340J

------------------------------------------------------------------------------------

PART-2

efficency = (Qh-Qc)/Qh

eff= 790-450/790

efficiency =0.4303

efficiency=43.03%

Add a comment

Answer 2

Answer #2

apply Work Done W = dQ-dU

W = 790-450 = 340 J -<<<<<<<<<<<<,answer

-------------

efficiency e = 1-T2/T1

e = W/Q

e = 340/790

e = 43.03 % effiecint -<<<<<<<<<<<<,answer

Add a comment

Answer 3

Answer #3

Add a comment

Answer 4

Similar Homework Help Questions

A heat engine extracts 51 kJ from the hot reservoir and exhausts 30 kJ into the cold reservoir. Part A What is the wo...

A heat engine extracts 51 kJ from the hot reservoir and exhausts 30 kJ into the cold reservoir. Part A What is the work done? ANSWER: Part B What is the efficiency?
1. A Carnot engine has a hot reservoir at 250 degrees C, and a a cold...

1. A Carnot engine has a hot reservoir at 250 degrees C, and a a cold reservoir at 25.0 degrees C. What is the efficiency of this engine? A) 10% B) 43% C) 57% D) 90% 2. A heat engine does 50 J of work and dumps 30 J of heat into the cold reservoir. How much heat was absorbed from the hot reservoir? A) 20 J B) 30 J C) 50 J D) 80 J 3. A heat engine...
[3] A heat engine is reported to operate with 25 % efficiency when the cold reservoir...

[3] A heat engine is reported to operate with 25 % efficiency when the cold reservoir is at 0° C. (a) Assuming this engine follows the Carnot cycle, what is the temperature of the hot reservoir? (b) Suppose the heat input to this engine was 10 J. Calculate the work done by this engine c) Suppose the heat input to this engine was 5). Calculate the heat rejected by this engine.

What is the efficiency of a heat engine that does 1250 J of work and gives...

What is the efficiency of a heat engine that does 1250 J of work and gives off 5250J of heat to the cold reservoir?
015 (part 1 of 3) 10.0 points An engine absorbs 2372 J from a hot reservoir...

015 (part 1 of 3) 10.0 points An engine absorbs 2372 J from a hot reservoir and expels 1049 J to a cold reservoir in each cycle. What is the engine's efficiency? 016 (part 2 of 3) 10.0 points How much work is done in each cycle? Answer in units of J 017 (part 3 of 3) 10.0 points What is the mechanical power output of the engine if each cycle lasts for 0.19 s? Answer in units of kW
An engine absorbs 1.68 kJ from a hot reservoir at 277°C and expels 1.22 kJ to...

An engine absorbs 1.68 kJ from a hot reservoir at 277°C and expels 1.22 kJ to a cold reservoir at 27°C in each cycle. (a) What is the engine's efficiency? % (b) How much work is done by the engine in each cycle? J (c) What is the power output of the engine if each cycle lasts 0.297 s? kW

Consider a reversible heat engine that employs a hot reservoir at a temperature of 660 K...

Consider a reversible heat engine that employs a hot reservoir at a temperature of 660 K and a cold reservoir at 230 K. (a) What is the entropy change of the hot reservoir during a period in which 4300 J is extracted from the hot reservoir? (b) What is the change in the entropy of the cold reservoir? (c) Find the change in the entropy of the engine itself during this time.
3) An engine absorbs 1.66 kJ from a hot reservoir at 277°C and expels 1.21 kJ...

3) An engine absorbs 1.66 kJ from a hot reservoir at 277°C and expels 1.21 kJ to a cold reservoir at 27°C in each cycle. (a) What is the engine's efficiency? % (b) How much work is done by the engine in each cycle? J (c) What is the power output of the engine if each cycle lasts 0.298 s? kW
An engine absorbs 1.71 kJ from a hot reservoir at 277°C and expels 1.21 kJ to...

An engine absorbs 1.71 kJ from a hot reservoir at 277°C and expels 1.21 kJ to a cold reservoir at 27°C in each cycle. (a) What is the engine's efficiency? (b) How much work is done by the engine in each cycle? (c) What is the power output of the engine if each cycle lasts 0.297 s? kW Need Help? Read it A Styrofoam cup holding 104 g of hot water at 1.00 x 102°C cools to room temperature, 26.0°C....

Imagine you have a hot reservoir at a temperature of 89.0 °C, and cold reservoir at...

Imagine you have a hot reservoir at a temperature of 89.0 °C, and cold reservoir at a temperature of 15.0 °C. Given their vast size, it is reasonable to assume the reservoirs\' temperatures will not change significantly if heat flows into or out of them. These reservoirs are then brought into thermal contact, during which 39210 J of heat flows from the hot reservoir to the cold reservoir. As a result of this heat exchange, what is the total change...

Problem 18.46 An engine receives 790J of heat from a hot reservoir and gives off 450J...

Homework Answers

Add Answer to:
Problem 18.46 An engine receives 790J of heat from a hot reservoir and gives off 450J...

Post as a guest

Earn Coins

A heat engine extracts 51 kJ from the hot reservoir and exhausts 30 kJ into the cold reservoir. Part A What is the wo...

1. A Carnot engine has a hot reservoir at 250 degrees C, and a a cold...

[3] A heat engine is reported to operate with 25 % efficiency when the cold reservoir...

What is the efficiency of a heat engine that does 1250 J of work and gives...

015 (part 1 of 3) 10.0 points An engine absorbs 2372 J from a hot reservoir...

An engine absorbs 1.68 kJ from a hot reservoir at 277°C and expels 1.22 kJ to...

Consider a reversible heat engine that employs a hot reservoir at a temperature of 660 K...

3) An engine absorbs 1.66 kJ from a hot reservoir at 277°C and expels 1.21 kJ...

An engine absorbs 1.71 kJ from a hot reservoir at 277°C and expels 1.21 kJ to...

Imagine you have a hot reservoir at a temperature of 89.0 °C, and cold reservoir at...

Problem 18.46 An engine receives 790J of heat from a hot reservoir and gives off 450J...

Homework Answers

Add Answer to: Problem 18.46 An engine receives 790J of heat from a hot reservoir and gives off 450J...

Post as a guest

Earn Coins

Add Answer to:
Problem 18.46 An engine receives 790J of heat from a hot reservoir and gives off 450J...