How do I Solve this

Question

Calculate the work (in liter-atmosphere) for the expansion of CO₂ from 1.2 to 2.5 liters against a pressure of 1.2 ATM

Answer 1

Pressure-Volume work:

w = -P∆V

w = work = ?

P = pressure = 1.2 atm

∆V = change in volume = 2.5 L - 1.2 L = 1.3 L (expansion means work done by the system on the surroundings, so sign will be negative)

w = -(1.2 atm)(1.3 L) = -1.56 Latm