## Isobaric and Isochoric

$w=-P\Delta V$
and
$w=-\int_{V_{1}}^{V_{2}}PdV=-nRTln\frac{V_{2}}{V_{1}}$

Petrina Kan 2I
Posts: 102
Joined: Fri Aug 30, 2019 12:17 am

### Isobaric and Isochoric

Are we expected to know the definitions of isobaric and isochoric? I don't recall ever going over these terms in class.

Alice Chang 2H
Posts: 101
Joined: Fri Aug 30, 2019 12:18 am

### Re: Isobaric and Isochoric

You might be asked to find entropy of a system given information about the system. So, this may include terminology like this.

BTW,
Isobaric: pressure remains constant

Isochoric: volume remains constant

Isothermic: temperature remains constant/the same

805383532
Posts: 53
Joined: Thu Jul 11, 2019 12:16 am

### Re: Isobaric and Isochoric

Just remember "iso" means same (equal measurements), "baric" is for pressure, and "choric" is for volume.

Areena H 2K
Posts: 81
Joined: Wed Dec 05, 2018 12:18 am

### Re: Isobaric and Isochoric

I think that it would be best to know them in case they come up on the exam. Isobaric is pressure, isothermal is where temperature is held constant, and isochoric is where volume is held constant.

Hussain Chharawalla 1G
Posts: 100
Joined: Sat Jul 20, 2019 12:15 am

### Re: Isobaric and Isochoric

It is also useful to know that in an isochoric system work is equal to 0. In isothermal delta U is 0.

Lauren Stack 1C
Posts: 100
Joined: Sat Aug 17, 2019 12:18 am

### Re: Isobaric and Isochoric

I believe knowing these terms would be important background to know regarding various changes to a system through temperature, pressure, etc
Here is a link to a discussion with these terms defined and a few more: viewtopic.php?f=128&t=9661