Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Heat and lost work in irreversible cycles: the two sides of the same
  coin   We discussed the criterion for usefully comparing an irreversible cycle with
a reversible one, and show that the lost work cannot be determined by the usual
cycle diagrams, contrary to what has been found in the literature. To better
understand the lost work concept and its role in entropy generation, we present
a conceptual model that uses Carnot cycles to describe thermal and mechanical
irreversibility, which also instructively reveals that heat and lost work are
the two sides of the same coin, this coin being the entropy generation. This
study, addressing issues that are virtually absent from the literature, is
expected to be not only relevant from a scientific standpoint but also useful
for physics teachers and students.

31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
16
The categories of this paper are: stat