Expansion against constant pressure


and

Moderators: Chem_Mod, Chem_Admin

Kayla T 1J
Posts: 11
Joined: Fri Sep 26, 2014 2:02 pm

Expansion against constant pressure

Postby Kayla T 1J » Thu Jan 21, 2016 4:15 pm

Is expansion against constant pressure in a system reversible? Would it be considered reversible in the case of an infinite number of steps?

katielee1K
Posts: 7
Joined: Mon Jan 26, 2015 2:17 pm

Re: Expansion against constant pressure

Postby katielee1K » Thu Jan 21, 2016 8:38 pm

when a reaction is has constant pressure it is irreversible. For an irreversible expansion, there is an inequality between the external and internal pressures of the system, and thus one form of volume change (either expansion or contraction) occurs.

Chem_Mod
Posts: 18400
Joined: Thu Aug 04, 2011 1:53 pm
Has upvoted: 435 times

Re: Expansion against constant pressure

Postby Chem_Mod » Fri Jan 22, 2016 11:32 am

Constant pressure can occur in a reversible process (isobaric process). In that case they heat up the system. As long as it occur in a gradual manner, it would be defined as reversible process. If you heat up the system so fast that the pressure of the system shoots up, then it is irreversible.


Return to “Calculating Work of Expansion”

Who is online

Users browsing this forum: No registered users and 0 guests