11. After the 6? electrocyclization of the reversible processes , this oxidation renders the entire sequence irreversible. 12. Reversible processes are a useful and convenient theoretical fiction, but do not occur in nature.13. "This is a potentially reversible process , " he says. 14. The entropy generation during a reversible process is zero. 15. Browning in response to chronic cold exposure has been well documented and is a reversible process . 16. The equality sign holds in the case that only reversible processes take place inside the system. 17. Then, for the fictive case of a reversible process , can be written in terms of exact differentials. 18. While Clausius based his definition on a reversible process , there are also irreversible processes that change entropy. 19. Entropy is reversible heat divided by system temperature and for a reversible process , total entropy is constant. 20. Evolution is not likely a reversible process .
