**Category:**

Research Papers

**Sub-Category:**

Relativity Theory

**Date Published:**

October 3, 2012

**Keywords:**

Thermodynamics, reversibility, irreversibility, energy, entropy, relativity, Einstein’s mass-energy relation

**Abstract:**

The aim of this paper is to recall with a very simple illustration that relativity - through the Einstein mass-energy relation - is a necessary component of the thermodynamic theory.

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