## Units for Work

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

Sara Pena 1I
Posts: 15
Joined: Fri Sep 25, 2015 3:00 am

### Units for Work

When do we use the conversion factor 101.325 (or 101,325) or divide by 1000 in our calculations? I'm a bit confused on the units we're suppose to be using throughout the calculation for work

Christina Pham 3H
Posts: 23
Joined: Fri Sep 25, 2015 3:00 am

### Re: Units for Work

So sometimes when you find work by multiplying external pressure by change in volume your answer may be in L*atm. In order to convert to Joules you would have to multiply by $\frac{101.325 J}{1 L*atm}$
In regards to dividing by 1000, when you have an answer in Joules and want to convert to Kilojoules, you divide by 1000.
Regarding work, you want your units to be in either Joules or Kilojoules

Sonia Perez 1G
Posts: 29
Joined: Fri Sep 25, 2015 3:00 am

### Re: Units for Work

When solving for work we use the formula
W=P (V final - V initial), after solving the units should be in atm and Liters. By using the conversion factor of 1 atm x liter is equal to 101.325 J, our final answer is in Joules.