Two consecutive carnot engines were designed in such a way that the efficiency of the first is 1.25 more than the efficiency of the second. The efficiency of the first engine is 0.60. Determine the sink temperature of the second engine if the input temperature at the first engine is 1050K. i. ii. Determine the input temperature of the first engine if the sink temperature of the second engine is 350K.

Two consecutive carnot engines were designed in such a way that the efficiency of the first is 1.25 more than the efficiency of the second. The efficiency of the first engine is 0.60. Determine the sink temperature of the second engine if the input temperature at the first engine is 1050K. i. ii. Determine the input temperature of the first engine if the sink temperature of the second engine is 350K.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

A 4.0-kg piece of aluminum at 29.4 °C is placed in 1.0 kg of water in a Styrofoam container at room temperature (20.0 °C). Part A Estimate the net change in entropy of the system. Express your answer to two significant figures and include the appropriate units. AS = μA Value Units ?
Problem 1: 5.00 moles of air (consider the air to be a diatomic gas) at 20.0 °C are compressed to half the initial volume during an adiabatic process. The temperature and the pressure are not constant during the process. Find the amount of work required during the process. (Do not assume that the temperature is constant)
A cylinder contains 0.250 mol of carbon dioxide (CO₂) gas at a temperature of 27.0°C. The cylinder is provided with a frictionless piston, which maintains a constant pressure of 1.00 atm on the gas. The gas is heated until its temperature increases to 127.0°C. Assume that the CO₂ may be treated as an ideal gas. Part A How much work is done by the gas in this process? Express your answer in joules. — ΑΣΦ W = Submit Part B On what is this work done? The work is done on the piston. The work is done on the cylinder. Submit Part C Request Answ AU = What is the change in internal energy of the gas? Express your answer in joules. ΑΣΦ Submit Request Answer Request Answer P Pearson W ? ? J J
The pV diagram in (Figure 1) shows the cycle followed by the gas in an ideal-gas refrigerator whose coefficient of performance is 1.5. The work done by the system during two adiabatic processes is shown. Figure P 4 Adiabats 1 of 1 > W₁ = -119 J W, = 79 J V ▼ ✓ Correct Part F What is Win for one cycle of this heat engine? Express your answer with the appropriate units. View Available Hint(s) Win = 119 μÅ Submit Previous Answers Request Answer Part G Complete previous part(s) J X Incorrect; Try Again; One attempt remaining Part H Complete previous part(s) Provide Feedback ?
A heat engine does 160 J of work per cycle while exhausting 420 J of waste heat. Part A What is the engine's thermal efficiency? Express your answer as a percentage.
Part A A refrigerator using helium gas operates on the reversed cycle shown in the following figure. Assume that T = -22 °C and T2 = -68 °C.(Eigure 1) What is the refrigerator's coefficient of performance? Express your answer using two significant figures. K = 1.2 Submit Previous Answers v Correct Part B What is the refrigerator's power input if it operates at 70 cycles per second? Express your answer to two significant figures and include the appropriate units. TH HẢ ? P = 2.33926 kW Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining Figure < 1 of 1 p (kPa) < Return to Assignment Provide Feedback Adiabats 150- V (cm³) 20 40 60 80 100
A heat engine does 30.0 J of work and exhausts 35.0 J of waste heat during each cycle. Part A What is the engine's thermal efficiency? Express your answer as a percentage. 46.2 % Submit Correct Part B Previous Answers If the cold-reservoir temperature is 30.0 °C, what is the minimum possible temperature in °C of the hot reservoir? Express your answer in degrees Celsius. —| ΑΣΦ 383.35 ? °C
1.) Why must a room air conditioner be placed in a window rather than just set on the floor and plugged in? Why can a refrigerator be set on the floor and plugged in? 2.) Does a refrigerator full of food consume more power if the room temperature is 200C than if it is 150C? Or is the power consumption the same? Explain your reasoning. 3.) What would be the efficiency of a Carnot engine operating with TH = TC? What would be the efficiency if TC = 0 K and TH were any temperature above 0 K? Interpret your answers.
A sophomore with nothing better to do adds heat to 0.480 kg of ice at 0.00° C until it is all melted. Part A What is the change in entropy of the water? Express your answer with the appropriate units. µA ? ASı Value Units Submit Request Answer Part B The source of heat is a very massive body at a temperature of 25.0° C. What is change entropy this body? Express your answer with the appropriate units. HÁ ? AS2 = Value Units %3D Submit Request Answer Part C What is the total change in entropy of the water and the heat source? Express your answer with the appropriate units.
In an engine, an almost ideal gas is compressed adiabatically to half its volume. In doing so, 2710 J of work is done on the gas. Part A ▼ How much heat flows into or out of the gas? Express your answer with the appropriate units. ? Q = Value Units Submit Request Answer Part B What is the change in internal energy of the gas? Express your answer with the appropriate units. HẢ ? AU = Value Units Submit Request Answer
Problem 1 A 0.20 kg/s of air are compressed isothermally from P,= 100 kPa and V,= 0.15 m3/s to P,= 700 kPa. Determine: The work in kW and the change in entropy in kJ/s-K for (a) closed or non-flow process and (b) open or steady flow process with initial and final velocity of v, = 15 m/s and v, = 60 m/s, respectively.
A California geothermal power plant generates 4.3 MW by extracting 24 MW of heat from an underground source at 108°C and then discharging waste heat into the 17°C air.a. What is the actual efficiency of the plant?b. What is the theoretical efficiency?