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Reversible vs Irreversible

Posted: Sun Feb 09, 2020 6:56 pm
by Angela Wu-2H
Why does it matter if a system is reversible or irreversible? Does it change the formulas utilized?

Re: Reversible vs Irreversible

Posted: Sun Feb 09, 2020 7:01 pm
by Bryce Barbee
I think with entropy it matters because one of the formulas only uses heat (reversible) divided by temperature.

Re: Reversible vs Irreversible

Posted: Sun Feb 09, 2020 7:08 pm
by Sjeffrey_1C
You use different formulas depending if it is reversible or irreversible.

Reversible: work = -nRT ln (v1/v2)

Irreversible: work = -Pext ΔV

Re: Reversible vs Irreversible

Posted: Sun Feb 09, 2020 7:11 pm
by 805383532
When a system is reversible, dStotal = dSsystem + dSsurroundings is equal to 0.

Re: Reversible vs Irreversible

Posted: Sun Feb 09, 2020 7:12 pm
by 805329408
For a reversible system, the system is isothermal and thus temperature is constant which impacts the formulas utilized since some are used for temperature change and some are used when temperature is constant which is the case of a isothermal, reversible system.

Re: Reversible vs Irreversible

Posted: Tue Feb 11, 2020 11:48 pm
by Michelle N - 2C
805329408 wrote:For a reversible system, the system is isothermal and thus temperature is constant which impacts the formulas utilized since some are used for temperature change and some are used when temperature is constant which is the case of a isothermal, reversible system.



Can you or someone here explain what equations can be used for reversible reactions and for irreversible reactions? Can some be used by both?

Re: Reversible vs Irreversible

Posted: Sun Feb 16, 2020 11:32 pm
by Abigail_Hagen2G
Yes, there are different equations to use based on if it's reversible or irreversible.

Re: Reversible vs Irreversible

Posted: Mon Feb 17, 2020 5:33 pm
by Emil Velasco 1H
It's also important to note that reversible does the most amount of work.