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Isobaric

Posted: Wed Feb 13, 2019 10:06 am
by Tamera Scott 1G
I understand that isobaric means that pressure is constant and ΔP=0, but what equation does it play a role in?

Re: Isobaric

Posted: Wed Feb 13, 2019 10:10 am
by Andrea Zheng 1H
For a constant pressure system, you would be able to use the equation W=-P*deltaV, as the P would be constant and thus can be multiplied by the change in volume to get the work done.

Re: Isobaric

Posted: Fri Feb 15, 2019 11:37 am
by Annalyn Diaz 1J
Also in relation to the change in internal energy, heat under constant pressure is dH, which could help with the manipulation of dU=q+w.

Re: Isobaric

Posted: Fri Feb 15, 2019 11:50 am
by Tarika Gujral 1K
That also means that you must use the Cv value for ideal gases

MONOATOMIC: 3/2*R
LINEAR: 5/2*R
NONLINEAR: 7/2*R

Re: Isobaric

Posted: Fri Feb 15, 2019 1:36 pm
by LaurenJuul_1B
it means that you can use the equation w=-PdeltaV

Re: Isobaric

Posted: Fri Feb 15, 2019 1:41 pm
by 904914909
isobaric means that the volume is still changing so you can still calculate work

Re: Isobaric

Posted: Sat Feb 16, 2019 10:33 pm
by Jasmine Chow 1F
for a isobaric equation to find work you will want to use W= -p delta V.

Re: Isobaric

Posted: Tue Feb 19, 2019 12:46 pm
by Niveda_B_3I
Isobaric basically means there is no change in pressure, which means you can have work and heat changing your internal energy.

Re: Isobaric

Posted: Tue Feb 19, 2019 12:57 pm
by Cody Do 2F
Isobaric means there's no change in pressure. As pressure is constant, use the formula w=-p*deltaV to find the work. Other words include Isochoric, which means there's no change in volume (AKA no work) and isothermic, which means no change in temperature (Delta U = 0).

Re: Isobaric

Posted: Tue Feb 19, 2019 5:23 pm
by Vicky Lu 1L
If there is no change in pressure, as stated as ΔP=0, then there is value for the pressure to be plugged in the equation of w =-PΔV. If the value of pressure or the change in volume are not given, then you can use -Δn*R*T to find work. At a constant pressure,qp equal to ΔH. You can also find q with q=nCpΔT.

Re: Isobaric

Posted: Thu Feb 21, 2019 12:47 am
by Mhun-Jeong Isaac Lee 1B
To further complement the above responses, know that W = -PdeltaV is used to calculate work done by expansion against constant P. So since isobaric means constant pressure, this equation would be used.

Re: Isobaric

Posted: Thu Feb 21, 2019 1:26 am
by LeannaPhan14BDis1D
What would work most would be w= -pdeltav