Lever rule

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: [Peter Atkins, Julio de Paula, "Atkins’ Physical Chemistry", 7th edition, Oxford University Press, ISBN 0-19-879285-9]

"nαlα = nβlβ"

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

It can be conveniently expressed as: [Fredrick Rhines, 'Phase Diagrams in Metallurgy' McGraw-Hill book company, 1956]

%α=(x*L)/(α*L)*100 %L=(α*x)/(α*L)*100

References

External links

*http://www.diracdelta.co.uk/science/source/l/e/lever%20rule/source.html
*http://www.brocku.ca/earthsciences/people/gfinn/petrology/binary3.htm


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