Log in
Chemistry
0
answers
0
watching
268
views
11 Dec 2019

A certain heat engine operates between 1000K and 300K. The max heat efficiency is 70% and the maximum work done by each for 1.0kJ is 0.7kJ.

(a) How much heat is discharged into the cold sink in a reversible process for 1.0kJ supplied by hot source

Watch
0
answers
0
watching
268
views

For unlimited access to Homework Help, a Homework+ subscription is required.

discord banner image
Join us on Discord
Chemistry Study Group
Join now

Related textbook solutions

Basic Chemistry
5 Edition,
Timberlake
ISBN: 9780134138046
Principles of Chemistry Molecular Approach
4th Edition,
Tro
ISBN: 9780134112831
Principles of Chemistry Molecular Approach
3rd Edition, 2014
Tro
ISBN: 9780321971944
Chemistry: Structure and Properties
2nd Edition,
Tro
ISBN: 9780134293936
Chemistry: A Molecular Approach
3rd Edition,
Tro
ISBN: 9780321809247
Chemistry: A Molecular Approach
5th Edition,
Tro
ISBN: 9780134874371
Principles of Chemistry: A Molecular Approach
4th Edition,
Tro
ISBN: 9780134895741
Chemistry: The Central Science
14th Edition, 2017
Brown
ISBN: 9780134414232

Related questions

A heat engine operates between -10 degreec C and 1000 degrees C and is ideal. How much heat must be supplied at 1000 degrees C if 1000 J of useful work is to be done by the engine?

Physical Chemistry

Calculate the maximum work (in J) that can be done by a reversible heat engine operating between 393oC and 61oC if 3,629 J is absorbed at 393oC.

About 86% of the world’s electrical energy is produced by using steam turbines, a form of heat engine. In his analysis of an ideal heat engine, Sadi Carnot concluded that the maximum possible efficiency is defined by the total work that could be done by the engine, divided by the quantity of heat available to do the work (for example, from hot steam produced
by combustion of a fuel such as coal or methane). This efficiency is given by the ratio (Thigh – Tlow)/Thigh, where Thigh is the temperature of the heat going into the engine and Tlow is that of the heat leaving the engine. (a) What is the maximum possible efficiency of a heat engine operating between an input temperature of 700 K and an exit temperature of 288 K? (b) Why is it important that electrical power plants be located near bodies of relatively cool water? (c) Under what conditions could a heat engine operate at or near 100% efficiency? (d) It is often said that if the energy of combustion of a fuel such as methane were captured in an electrical fuel cell instead of by burning the fuel in a heat engine, a greater fraction of the energy could be put to useful work. Make a qualitative drawing like that in Figure 5.10 (p. 175) that illustrates the fact that in principle the fuel cell route will produce more useful work than the heat engine route from combustion of methane

b) It is important because naturally cold water provides lower exit temperature, and lower is the exit temperature (Tmin) the more efficient is the steam engine.

c) If Tmin = 0 (an exit temperature is the absolute zero), the process would be 100% efficient. The closer is the exit temperature to 0 K, the more efficient is the process.

d)

Weekly leaderboard

Home
Homework Help 3,900,000
Chemistry 830,000
Start filling in the gaps now
Log in