Practice Quiz #3


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Michael Lonsway 3O
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Joined: Wed Sep 21, 2016 2:57 pm

Practice Quiz #3

Postby Michael Lonsway 3O » Sun Jan 29, 2017 7:23 pm

If 2.00 mol of an ideal gas at 300. K and 3.00 atm expands isothermally and reversible from 6.00L to 18.00L and has a final pressure of 1.20 atm, what is w, q, and delta U?

The answer key said that delta U is 0 but would it still be 0 if we weren't working with an ideal gas? Also what initial conditions would cause q, w, or delta U to be 0?

Audrey_Hall_2I
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Re: Practice Quiz #3

Postby Audrey_Hall_2I » Sun Jan 29, 2017 8:14 pm

Also are we supposed to be able to solve this and get numerical answers or is it conceptual?

Michael Lonsway 3O
Posts: 43
Joined: Wed Sep 21, 2016 2:57 pm

Re: Practice Quiz #3

Postby Michael Lonsway 3O » Sun Jan 29, 2017 10:01 pm

You need to solve this problem numerically but I was also wondering the concept behind when u, q, or w would be 0.

Chem_Mod
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Re: Practice Quiz #3

Postby Chem_Mod » Tue Jan 31, 2017 12:39 am

when it is an ideal gas and isothermal.

I'm not fully sure if the conditions were with a gas that was not an ideal gas that .

As for the rest;

w = 0, when the volume is constant, because of

q is generally not zero too many times except for when the whole system needs to sum to zero such as when the system is isolated.


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