Question Detail
Question
A gas expands against a constant external pressure of 2.0 atm from 10 L to 25 L. Calculate the work done by the system in Joules.
Correct Answer
Option A is the correct answer.
Detailed Explanation
w = -PΔV = -2.0 atm × (25 - 10) L = -30 L·atm. Convert to J: -30 L·atm × 101.325 J/L·atm = -3039.75 J ≈ -3040 J. The negative sign indicates work is done by the system on the surroundings.
Hint
Use w = -PΔV for constant pressure processes. Remember 1 L·atm = 101.325 J.