what is the formula for phase rule?

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D. Gowreswari's picture

Regards

D. Gowreswari

B.Pharm,

Viswanadha Institute of Pharmaceutical Sciences, Visakhapatnam

www.vnips.edu.in

Vamsi Krishna's picture

Answer: 

phase rule

noun Physical Chemistry .
a law that the number of degrees of freedom in a system in equilibriumis equal to two plus the number of components less the number ofphases. Thus, a system of ice, melted ice, and water vapor, beingone component and three phases, has no degrees of freedom.Compare variance (  def 4 )

refernce by net

B.T.N VAMSI KRISHNA

VISWANATHA INSTITUTE OF PHARMACEUTICAL SCIENCES

 

 

Arun Kumar's picture

Answer: 
Gibbs Phase Rule: f = c - p + 2 
f = Intensive Degrees of freedom = variance 
Number of intensive variables that can be changed independently without 
disturbing the number of phases in equilibrium 
p = number of phases 
gas, homogeneous liquid phases, homogeneous solid phases 
c = components 
Minimum number of independent constituents.ref:http://www.pharmainfo.net/answers/pharmaquestion/what-formula-phase-rule

Regards

K. Arun Kumar

Viswanadha Inst. of Pharmaceutical Sciences

www.vnips.edu.in

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