On the Conditions of Principle of Maximum Work

Based on general principle of the 2nd low of thermodynamics, methods for verifying the "Principle of Maximum Work" are summarized and same essential problems in this area are discussed. There is a main concept presented in the article, i. e. the surrounding conditions must be never forgotten when analyzing thermodynamical subjectst Some valuable conclusions are drawn to help to clear several uncertainties which usually exit in study on thermodynamics.