Reasonable Assumptions

isochoric/isometric:
isothermal:
isobaric:

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DanielleNario1A
Posts: 35
Joined: Fri Sep 28, 2018 12:24 am

Reasonable Assumptions

Postby DanielleNario1A » Tue Feb 12, 2019 5:22 pm

Does anyone have a consolidated list of the assumptions we can make in calculations? For example how deltaU is 0 for isothermal processes

Nada AbouHaiba 1I
Posts: 77
Joined: Fri Sep 28, 2018 12:28 am
Been upvoted: 1 time

Re: Reasonable Assumptions

Postby Nada AbouHaiba 1I » Tue Feb 12, 2019 5:58 pm

I don't have a list but I have two assumptions :
1. When a rxn is isothermal/reversible delta S Universe = 0
2. When a rxn is irreversible delta S Surroundings = 0

Brandon_Tran_2E
Posts: 63
Joined: Fri Sep 28, 2018 12:23 am

Re: Reasonable Assumptions

Postby Brandon_Tran_2E » Tue Feb 12, 2019 6:25 pm

To answer the second part of your question, Delta U = 0 in isothermal systems because one of the equations Lavelle showed us is that
delta U = 3/2nR(delta T) and if there is no change in T then there is no change in U.


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