# Gas Expansion

## Homework Statement

A gas is initially at (20 Pa, 3 m3) and expands to (30 Pa, 17 m3).

The minimum amount of pressure the gas can be under is 9 Pa, and the maximum pressure the gas can be under is 40 Pa.

Find the minimum amount of work that can be done by the gas in going from its initial state to its final state.

## Homework Equations

W = P$$\Delta$$V

## The Attempt at a Solution

The statement doesn't state whether heat is added to the system, or whether the gas temperature changes. If the temperature varies, then P, V, and T all vary, so not sure how to approach this.

p.s., the answer provided is 126 J.

Thanks!