Lever rule

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The lever rule
The lever rule

Using the lever rule one can determine quantitatively the relative composition of a mixture in a two-phase region in a phase diagram. The distances l from the mixture point along a horizontal tie line to both phase boundaries give the composition:[1]

nαlα = nβlβ

nα represents the amount of phase α and nβ represents the amount of phase β.

It can be conveniently expressed as:[2]

%α=(x*L)/(α*L)*100
%L=(α*x)/(α*L)*100

[edit] References

  1. ^ Peter Atkins, Julio de Paula, Atkins’ Physical Chemistry, 7th edition, Oxford University Press, ISBN 0-19-879285-9
  2. ^ Fredrick Rhines, 'Phase Diagrams in Metallurgy' McGraw-Hill book company, 1956

[edit] External links

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