1 hr = 60 min
1 min = 60 s
1 W = 1 J/s
A 100-W light bulb is placed in a cylinder equipped with a moveable piston. The lightbulb is turned on for 0.020 hour, and the assembly expands from an initial volume of 0.90 L to a final volume of 5.86 L against an external pressure of 1.0 atm.
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