## Calculation Help

$\Delta U=q+w$

Jennifer Torres 2L
Posts: 62
Joined: Tue Nov 14, 2017 3:01 am

### Calculation Help

Why do we have to use 5/2 and 3/2 to solve the equations? I understand that they are a type of constant but how do we derive these specific numbers?

Jonathan Omens 1K
Posts: 60
Joined: Fri Sep 28, 2018 12:15 am

### Re: Calculation Help

5/2 R should be used when pressure is constant and 3/2 R when volume is constant. They are derived from ideal gas equations not discussed in class.