RXN constant P

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Nahelly Alfaro-2C
Posts: 59
Joined: Wed Nov 15, 2017 3:04 am

RXN constant P

Postby Nahelly Alfaro-2C » Sun Feb 03, 2019 11:02 pm

When is the rxn constant P significant and insignificant? Why is knowing its significance important?

Celeste 1I
Posts: 44
Joined: Fri Sep 28, 2018 12:18 am

Re: RXN constant P

Postby Celeste 1I » Sun Feb 03, 2019 11:28 pm

I'm assuming you mean constant pressure. If something is under constant pressure that means the change in pressure is equal to 0 which means you can basically ignore it in the equation.

Laura Gong 3H
Posts: 89
Joined: Fri Sep 28, 2018 12:26 am
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Re: RXN constant P

Postby Laura Gong 3H » Mon Feb 04, 2019 2:20 pm

Knowing when the reaction is occurring under constant pressure can help you solve problems involving work. It can help you determine which equation to use (either w=-PdetlaV or w=-nRTln(Vf/Vi)).
Also at constant pressure we can determine that qp=deltaH.

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