Physical Chemistry
Physical Chemistry
3rd Edition
ISBN: 9780321812001
Author: ENGEL, Thomas/ Reid
Publisher: Pearson College Div
Question
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Chapter 5, Problem 5.2NP

(a)

Interpretation Introduction

Interpretation:

The efficiency of a Carnot engine operation under conditions where the outlet and condensate temperatures are: 540°C and 30°C respectively needs to be deduced

Concept Introduction:

The efficiency (e) of a Carnot engine is a function of the reservoir temperatures and can be expressed as:

  ε = 1ThotTcold ------(1)

(b)

Interpretation Introduction

Interpretation:

The total efficiency of the power generating unit needs to be deduced based on the given individual unit efficiencies.

Concept Introduction:

The total efficiency is given as a product of the individual efficiencies,

  Total Efficiency = ε1×ε2×...εn ------(2)

Where e1, e2…..are the efficiencies of the individual units

(c)

Interpretation Introduction

Interpretation:

The amount of coal required per hour at its peak output needs to be calculated.

Concept Introduction:

The efficiency of an engine is also given in terms of the ration of the energy output to the heat input

  ε = Eoutputqinput ------(3)

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