A turboexpander uses woA turboexpander uses work from the expansion of gas to generate power. Suppose a turboexpander uses a natural gas mixture at 75.0 bar, 11oC that is allowed to rapidly expand until it is 39.3 bar.rk from the expansion of gas to generate power. Suppose a turboexpander uses a natural gas mixture at 75.0 bar, 11oC that is allowed to rapidly expand until it is 39.3 bar