## reversible/irreversible processes

$\Delta U=q+w$

Sol Lee 2H
Posts: 5
Joined: Fri Sep 25, 2015 3:00 am

### reversible/irreversible processes

this may sound very basic at this point but,

What exactly is reversible/irreversible in a reversible/irreversible process?

._.

Annie Qing 2F
Posts: 28
Joined: Fri Sep 25, 2015 3:00 am

### Re: reversible/irreversible processes

Irreversible processes are ones that happen suddenly (e.g. gas being released into a vacuum) whereas reversible processes are done over a theoretically infinite amount of time because the change happens in infinitesimally small parts. In a reversible process, the system is in equilibrium throughout the entire change and energy from work is maximized (most efficient).

Hope this clears (at least some) things up!