## U= 3/2nRT

$\Delta U=q+w$

Layal Suboh 1I
Posts: 61
Joined: Fri Sep 28, 2018 12:23 am

### U= 3/2nRT

Hello,

When is the equation U= 3/2 nrT used? Is it only applicable when the system is isothermal? Also, for this question, is the volume constant and pressure changing?

Thanks!

melodyzaki2E
Posts: 61
Joined: Fri Sep 28, 2018 12:18 am

### Re: U= 3/2nRT

i think this is used when you have to calculate the heat capacity of an ideal gas at a constant volume

Gracie Ge 2E
Posts: 28
Joined: Wed Nov 21, 2018 12:19 am

### Re: U= 3/2nRT

the reaction will most likely not be isothermal.
(you can look at question 4C3)