Isobaric

isochoric/isometric:
isothermal:
isobaric:

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Tamera Scott 1G
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Joined: Fri Sep 28, 2018 12:27 am

Isobaric

Postby Tamera Scott 1G » Wed Feb 13, 2019 10:06 am

I understand that isobaric means that pressure is constant and ΔP=0, but what equation does it play a role in?

Andrea Zheng 1H
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Joined: Fri Sep 28, 2018 12:26 am

Re: Isobaric

Postby Andrea Zheng 1H » Wed Feb 13, 2019 10:10 am

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.

Annalyn Diaz 1J
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Joined: Fri Sep 28, 2018 12:15 am

Re: Isobaric

Postby Annalyn Diaz 1J » Fri Feb 15, 2019 11:37 am

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.

Tarika Gujral 1K
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Re: Isobaric

Postby Tarika Gujral 1K » Fri Feb 15, 2019 11:50 am

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

LaurenJuul_1B
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Re: Isobaric

Postby LaurenJuul_1B » Fri Feb 15, 2019 1:36 pm

it means that you can use the equation w=-PdeltaV

904914909
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Joined: Fri Sep 28, 2018 12:26 am

Re: Isobaric

Postby 904914909 » Fri Feb 15, 2019 1:41 pm

isobaric means that the volume is still changing so you can still calculate work

Jasmine Chow 1F
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Re: Isobaric

Postby Jasmine Chow 1F » Sat Feb 16, 2019 10:33 pm

for a isobaric equation to find work you will want to use W= -p delta V.

Niveda_B_3I
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Re: Isobaric

Postby Niveda_B_3I » Tue Feb 19, 2019 12:46 pm

Isobaric basically means there is no change in pressure, which means you can have work and heat changing your internal energy.

Cody Do 2F
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Joined: Fri Sep 28, 2018 12:23 am

Re: Isobaric

Postby Cody Do 2F » Tue Feb 19, 2019 12:57 pm

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).

Vicky Lu 1L
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Joined: Fri Sep 28, 2018 12:18 am

Re: Isobaric

Postby Vicky Lu 1L » Tue Feb 19, 2019 5:23 pm

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.

Mhun-Jeong Isaac Lee 1B
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Re: Isobaric

Postby Mhun-Jeong Isaac Lee 1B » Thu Feb 21, 2019 12:47 am

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.

LeannaPhan14BDis1D
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Re: Isobaric

Postby LeannaPhan14BDis1D » Thu Feb 21, 2019 1:26 am

What would work most would be w= -pdeltav


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