Final answer:
The work done by the gas in the expansion is -62.5 atm*L.
Step-by-step explanation:
The work done by a gas in an expansion can be calculated using the formula:
Work = -PΔV
Where P is the pressure and ΔV is the change in volume. In this case, the gas expands from 60.0 L to 110.0 L at constant temperature.
The change in volume is
110.0 L - 60.0 L = 50.0 L.
The work done by the gas can be calculated as:
Work = -PΔV
= -(1.2500 atm)(50.0 L)
= -62.5 atm*L