相そう律りつ

noun

phase rule

Technical term in physical chemistry; describes the relationship between the number of phases, components, and degrees of freedom in a system at equilibrium.

• 相そう律りつによれば、一いち成せい分ぶん系けいでは最さい大だいで三さん相そうが共きょう存ぞんできる。

  According to the phase rule, a one-component system can have at most three phases coexisting.