(a) To determine The rate of energy extraction from the hot reservoir. Explanation Write the equation for the work done by the engine. W = Q h − Q c Here, W is the work done by the engine, Q h is the heat extracted from the hot reservoir and Q c is the heat rejected at the cold reservoir. Divide all the terms in the above equation by time t . W t = Q h t − Q c t Here, W / t is the power output, Q h / t is the rate of energy extraction from the hot reservoir and Q c / t is the rate at which heat is rejected to the cold reservoir. Rewrite the above equation for Q h / t (b) To determine The efficiency of the engine. (c) To determine The temperature of the ambient environment.

4th Edition

ISBN: 9780135272947

Author: Wolfson

Publisher: VST

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Question

Chapter 19, Problem 25E

(a)

To determine

The rate of energy extraction from the hot reservoir.

(b)

To determine

The efficiency of the engine.

(c)

To determine

The temperature of the ambient environment.

Expert Solution & Answer

Chapter 19 Solutions

EBK ESSENTIAL UNIVERSITY PHYSICS, VOLUM

Ch. 19.1 - Which of these processes is irreversible? (a)...Ch. 19.2 - The low temperature for a practical heat engine is...Ch. 19.3 - A clever engineer decides to increase the...Ch. 19.4 - In each of the following processes, does the...Ch. 19 - Could you cool the kitchen by leaving the...Ch. 19 - Prob. 2FTD Ch. 19 - Prob. 3FTD Ch. 19 - Name some irreversible processes that occur in a...Ch. 19 - Your power company claims that electric heat is...Ch. 19 - A hydroelectric power plant, using the energy of...

Ch. 19 - A heat-pump manufacturer claims the device will...Ch. 19 - The heat Q added during adiabatic free expansion...Ch. 19 - Energy is conserved, so why cant we recycle it as...Ch. 19 - Why doesnt the evolution of human civilization...Ch. 19 - What are the efficiencies of reversible heat...Ch. 19 - A cosmic heat engine might operate between the...Ch. 19 - A reversible Carnot engine operating between...Ch. 19 - A Carnot engine absorbs 900 J of heat each cycle...Ch. 19 - Find the COP of a reversible refrigerator...Ch. 19 - Prob. 16E Ch. 19 - The human body can be 25% efficient at converting...Ch. 19 - Calculate the entropy change associated with...Ch. 19 - You metabolize a 650-kcal burger at your 37C body...Ch. 19 - You heat 250 g of water from 10C to 95C. By how...Ch. 19 - Melting a block of lead already at its melting...Ch. 19 - How much energy becomes unavailable for work in an...Ch. 19 - Prob. 23E Ch. 19 - Prob. 24E Ch. 19 - Example 19.1: A Carnot engine’s mechanical power...Ch. 19 - Prob. 26E Ch. 19 - Prob. 27E Ch. 19 - Prob. 28E Ch. 19 - Prob. 29E Ch. 19 - Prob. 30E Ch. 19 - Example 19.4: A gas cylinder with interior volume...Ch. 19 - A Carnot engine extracts 745 J from a 592-K...Ch. 19 - The maximum steam temperature in a nuclear power...Ch. 19 - Youre engineering an energy-efficient house that...Ch. 19 - A power plants electrical output is 750 MW....Ch. 19 - A power plant extracts energy from steam at 280C...Ch. 19 - The electric power output of all the thermal...Ch. 19 - Prob. 38P Ch. 19 - You operate an industrial freezer that maintains...Ch. 19 - Use appropriate energy-flow diagrams to analyze...Ch. 19 - Prob. 41P Ch. 19 - A refrigerator maintains an interior temperature...Ch. 19 - You operate a store thats heated by an oil furnace...Ch. 19 - Use energy-flow diagrams to show that the...Ch. 19 - An air-source heat pump has an actual COP of 2.72...Ch. 19 - A reversible engine contains 0.350 mol of ideal...Ch. 19 - (a) Determine the efficiency for the cycle shown...Ch. 19 - Prob. 48P Ch. 19 - A shallow pond contains 94 Mg of water. In winter,...Ch. 19 - Estimate the rate of entropy increase associated...Ch. 19 - The temperature of n moles of ideal gas is changed...Ch. 19 - The temperature of n moles of ideal gas is changed...Ch. 19 - A 6.36-mol sample of ideal diatomic gas is at 1.00...Ch. 19 - A 250-g sample of water at 80C is mixed with 250 g...Ch. 19 - An ideal gas undergoes a process that takes it...Ch. 19 - In an adiabatic free expansion, 6.36 mol of ideal...Ch. 19 - Find the entropy change when a 2.4-kg aluminum pan...Ch. 19 - An engine with mechanical power output 8.5 kW...Ch. 19 - Find the change in entropy as 2.00 kg of H2O at...Ch. 19 - Prob. 60P Ch. 19 - The compression ratio r of an engine is the ratio...Ch. 19 - Prob. 62P Ch. 19 - The 54-M W wood-fired McNeil Generating Station in...Ch. 19 - A 500-g copper block at 80C is dropped into 1.0 kg...Ch. 19 - An objects heat capacity is inversely proportional...Ch. 19 - A Carnot engine extracts heat from a block of mass...Ch. 19 - In an alternative universe, youve got the...Ch. 19 - Youre the environmental protection officer for a...Ch. 19 - Prob. 69P Ch. 19 - Prob. 70P Ch. 19 - The molar specific heat at constant pressure for a...Ch. 19 - Prob. 72P Ch. 19 - Energy-efficiency specialists measure the heat Qh...Ch. 19 - Refrigerators remain among the greatest consumers...Ch. 19 - The refrigerators COP is a. 13. b. 2. c. 3. d. 4.Ch. 19 - The fuel energy consumed at the power plant to run...Ch. 19 - Prob. 77PP

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