<a href="https://en.wikipedia.org/wiki/Carnot_cycle" class="extiw" title="en:Carnot cycle">Carnot cycle</a> in the p-V diagram.
<a href="//commons.wikimedia.org/wiki/User:Derkleinebauer" title="User:Derkleinebauer">Derkleinebauer</a>
<span class="int-own-work" lang="en">Own work</span>