Classical Physics


Entropy and 'The Arrow of Time', A Love Story

Authors: Constantinos Ragazas

In this short note we offer a new definition of entropy and derive an interesting relationship between entropy and time. In light of this relationship, we show how The Second Law of Thermodynamics can be interpreted as saying that every physical process requires a lapse of time. In simple language, the Second Law says that 'everything happens over some positive time-interval'. This defines 'the arrow of time'. This understanding of entropy maintains the reciprocal relationship between entropy and temperature, makes entropy 'additive', and preserves the notion that entropy provides a measure of 'available energy' to do work. What does change, however, is the idea that entropy is a measure of disorder, and the Universe is doomed to thermal death.

Comments: 4 pages

Download: PDF

Submission history

[v1] 26 Jul 2010
[v2] 4 Aug 2010

Unique-IP document downloads: 235 times is a pre-print repository rather than a journal. Articles hosted may not yet have been verified by peer-review and should be treated as preliminary. In particular, anything that appears to include financial or legal advice or proposed medical treatments should be treated with due caution. will not be responsible for any consequences of actions that result from any form of use of any documents on this website.

Add your own feedback and questions here:
You are equally welcome to be positive or negative about any paper but please be polite. If you are being critical you must mention at least one specific error, otherwise your comment will be deleted as unhelpful.

comments powered by Disqus