Assuming ideal gas

Moderators: Chem_Mod, Chem_Admin

Katie Frei 1L
Posts: 64
Joined: Fri Sep 28, 2018 12:27 am

Assuming ideal gas

Postby Katie Frei 1L » Wed Mar 13, 2019 12:48 pm

When can we assume that a gas is behaving in an ideal manner? For example, in 4D.7) of the 7th edition of the textbook, the solutions manner uses the ideal gas equation to solve for the work, and eventually the change in internal energy (but the book never says that the gas is ideal). How would I know to use the ideal gas law in this type of instance?

CHEM 14B Lover
Posts: 33
Joined: Fri Sep 28, 2018 12:19 am

Re: Assuming ideal gas

Postby CHEM 14B Lover » Thu Mar 14, 2019 2:25 pm

I think a lot of questions just require you to think the gas is ideal to apply formulas. IRL lot of energy is lost to heat or sound etc. so even if it's not stated explicitly you basically assume gas is ideal all the time.

Tameen Ahmed 4C
Posts: 30
Joined: Fri Sep 28, 2018 12:19 am

Re: Assuming ideal gas

Postby Tameen Ahmed 4C » Thu Mar 14, 2019 3:29 pm

I think you assume the question is referring to an ideal gas unless otherwise stated!

Mark 1D
Posts: 63
Joined: Fri Sep 28, 2018 12:18 am

Re: Assuming ideal gas

Postby Mark 1D » Sat Mar 16, 2019 7:05 pm

should usually assume, sometimes question also mentions it explicitly


Return to “Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)”

Who is online

Users browsing this forum: No registered users and 3 guests