Calculate the work, w, gained or lost by the system when a gas expands from 15 l to 45 l against a constant external pressure of 1.5 atm. 1 l × atm = 101 j.

Work done by the system = 4545 J

Explanation:

The expression for the calculation of work done is shown below as:

Where, P is the pressure

is the change in volume

From the question,  

= 45 - 15 L = 30 L

P = 1.5 atm

Also, 1 atmL = 101 J

So,  

(negative sign implies work is done by the system)

Work done by the system = 4545 J