A Textbook on Marine Engineering: Steam Engines, the Machinery of Western River Steamboats, Recent Developments in Marine Engineering, Dynamos and Motors, With Practical Question and Examples (Classic

Excerpt from A Textbook on Marine Engineering: Steam Engines, the Machinery of Western River Steamboats, Recent Developments in Marine Engineering, Dynamos and Motors, With Practical Question and Examples

The piston moves to the right because the pressure and temperature Of the live steam on the left are greater than the pressure and temperature Of the exhaust steam on the right of the piston. This means that the molecules Of steam on the left are vibrating more rapidly than those on the right. The difference between the kinetic energy Of the steam on the left and the steam on the right is, therefore, just equal to the work Of moving the piston.

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