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Example of outer work. Outer work is the overcoming of the outside pressure through a certain distance by means of expanding. As the piston in the image is lowered, no outer work is done. Inner work is done. Inner work is the to push molecules farther apart against the force of cohesion that is trying to hold them together.

Outer Work

Example of outer work. Outer work is the overcoming of the outside pressure through a certain distance…