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A coal-fired electrical power station has an efficiency of 38$\%$ . The temperature of the steam leaving the boiler is $550^{\circ} \mathrm{C} .$ What percentage of the maximum efficiency does this station obtain? (Assume the temperature of the environment is $20^{\circ} \mathrm{C} . )$

64.4$\%$59$\%$

Physics 101 Mechanics

Chapter 15

Thermodynamics

Thermal Properties of Matter

The First Law of Thermodynamics

The Second Law of Thermodynamics

University of Washington

Simon Fraser University

Hope College

University of Winnipeg

Lectures

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The First Law of Thermodyn…

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(a) At a steam power plant…

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so maximum efficiency. Aita. Let's say maximum ater is equal to efficiency off Cardinals engine that is one minus. T c divided by th. Now we are given TC and we are given th T. C is 23 Celsius, so we must add a factor of 2 73 to this. To make it in terms of Calvin. T. Edge is 5 15 in your senses. 5 50 plus 2 73 Again, we must get temperatures in Kelvin. So if you do this calculation and find that the answer is 64% 64.4% or you get actual answers. Corn 644 So that's maximum efficiency. If we had cardinals angle. No, we are asked to find a percentage off maximum efficiency, the station updates, so we are given actual efficiency. Eight actually is equal to 38% so 0.38 So let's take a ratio off them yet are actually divided by a Tom mats. So 0.38 divided by 644 Let's do this calculation. You'll find that the answer here is 0.59 That is equal to 59% so this engine obtains maximum efficiency off 38% which is actually 59% off maximum efficiency if it can operate as cardinals engine that is maximum efficiency engine no.

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