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In a Diesel engine, atmospheric air is quickly compressed

An Introduction to Thermal Physics | 1st Edition | ISBN: 9780201380279 | Authors: Daniel V. Schroeder ISBN: 9780201380279 40

Solution for problem 37P Chapter 1

An Introduction to Thermal Physics | 1st Edition

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An Introduction to Thermal Physics | 1st Edition | ISBN: 9780201380279 | Authors: Daniel V. Schroeder

An Introduction to Thermal Physics | 1st Edition

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Problem 37P

Problem 37P

In a Diesel engine, atmospheric air is quickly compressed to about 1/20 of its original volume. Estimate the temperature of the air after compression, and explain why a Diesel engine does not require spark plugs.

Step-by-Step Solution:

Solution

Step 1 of 3

A diesel engine,compresses air of volume  at atmospheric pressure and temperature  which contains a diatomic molecules, hence it has 5 degrees of freedom (f=5=3 translational and 2 rotational) to a final volume and temperature of  and respectively. By considering the process to be adiabatic,we need to estimate the final temperature of gas after compression .

Given data,

Initial volume,

Initial temperature,

Degrees of freedom, f=5

Final volume,

To find,

Final temperature, =?

Step 2 of 3

Chapter 1, Problem 37P is Solved
Step 3 of 3

Textbook: An Introduction to Thermal Physics
Edition: 1
Author: Daniel V. Schroeder
ISBN: 9780201380279

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In a Diesel engine, atmospheric air is quickly compressed