We’re being asked to **calculate the work **for a system that has an initial volume of 0.90 L to a final volume of 5.88 L against an external pressure of 1.0 atm.

Recall that ** work (w)** is given by:

$\overline{){\mathbf{w}}{\mathbf{=}}{\mathbf{-}}{\mathbf{P\Delta V}}}$

where:

**P** = pressure (in atm)

**ΔV** = V_{final} – V_{initial} = change in volume (in L)

A 100-W lightbulb 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 5.88 L against an external pressure of 1.0 atm.

Calculate w.

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