## Isobaric

isochoric/isometric: $\Delta V = 0$
isothermal: $\Delta T = 0$
isobaric: $\Delta P = 0$

Tamera Scott 1G
Posts: 65
Joined: Fri Sep 28, 2018 12:27 am

### Isobaric

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

Andrea Zheng 1H
Posts: 61
Joined: Fri Sep 28, 2018 12:26 am

### Re: Isobaric

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
Posts: 61
Joined: Fri Sep 28, 2018 12:15 am

### Re: Isobaric

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
Posts: 62
Joined: Fri Sep 28, 2018 12:27 am

### Re: Isobaric

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
Posts: 65
Joined: Fri Sep 28, 2018 12:17 am

### Re: Isobaric

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

904914909
Posts: 60
Joined: Fri Sep 28, 2018 12:26 am

### Re: Isobaric

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

Jasmine Chow 1F
Posts: 60
Joined: Fri Sep 28, 2018 12:16 am
Been upvoted: 1 time

### Re: Isobaric

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

Niveda_B_3I
Posts: 60
Joined: Fri Sep 28, 2018 12:24 am

### Re: Isobaric

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

Cody Do 2F
Posts: 62
Joined: Fri Sep 28, 2018 12:23 am

### Re: Isobaric

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
Posts: 60
Joined: Fri Sep 28, 2018 12:18 am

### Re: Isobaric

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
Posts: 54
Joined: Fri Sep 28, 2018 12:17 am

### Re: Isobaric

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
Posts: 57
Joined: Fri Sep 28, 2018 12:16 am

### Re: Isobaric

What would work most would be w= -pdeltav