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Get Full Access to College Physics - 1 Edition - Chapter 15 - Problem 55pe
Get Full Access to College Physics - 1 Edition - Chapter 15 - Problem 55pe

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# A large electrical power station generates 1000 MW of ISBN: 9781938168000 42

## Solution for problem 55PE Chapter 15

College Physics | 1st Edition

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Problem 55PE

Problem 55PE

A large electrical power station generates 1000 MW of electricity with an efficiency of 35.0%. (a) Calculate the heat transfer to the power station, Qh , in one day. (b) How much heat transfer Qc occurs to the environment in one day? (c) If the heat transfer in the cooling towers is from 35.0º C water into the local air mass, which increases in temperature from 18.0º C to 20.0º C , what is the total increase in entropy due to this heat transfer? (d) How much energy becomes unavailable to do work because of this increase in entropy, assuming an 18.0º C lowest temperature? (Part of Qc could be utilized to operate heat engines or for simply heating the surroundings, but it rarely is.)

Step-by-Step Solution:
Step 1 of 3

Solution 55PE

a) Heat transfer to the power station in one day is

Qh = 2.47 x 1014 j

b)  the heat transfer to the environment in one day is

Qc  = 1.06 x 1014 j

c)   total increase in entropy is

2.85 x 1010 j/k

d)   the unavailable work is

8.29 x 1012 j

Step 2 of 3

Step 3 of 3

##### ISBN: 9781938168000

This textbook survival guide was created for the textbook: College Physics , edition: 1. The answer to “A large electrical power station generates 1000 MW of electricity with an efficiency of 35.0%. (a) Calculate the heat transfer to the power station, Qh , in one day. (b) How much heat transfer Qc occurs to the environment in one day? (c) If the heat transfer in the cooling towers is from 35.0º C water into the local air mass, which increases in temperature from 18.0º C to 20.0º C , what is the total increase in entropy due to this heat transfer? (d) How much energy becomes unavailable to do work because of this increase in entropy, assuming an 18.0º C lowest temperature? (Part of Qc could be utilized to operate heat engines or for simply heating the surroundings, but it rarely is.)” is broken down into a number of easy to follow steps, and 125 words. The full step-by-step solution to problem: 55PE from chapter: 15 was answered by , our top Physics solution expert on 07/07/17, 04:39PM. Since the solution to 55PE from 15 chapter was answered, more than 503 students have viewed the full step-by-step answer. This full solution covers the following key subjects: heat, transfer, power, station, temperature. This expansive textbook survival guide covers 34 chapters, and 3125 solutions. College Physics was written by and is associated to the ISBN: 9781938168000.

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