Scaling analysis of thermodynamic properties in the critical region of fluids

A rev ie w of th e sca le d e qu ation of s tate proposed for th e crit ic a l region of Aui ds a nd magne ts is given usin g th e la ngu age a pprop ri ate fo r Auid s. Th e expe rim e nt al ev idence for the va li d it y of th e bas ic h ypo th es is und erlyin g thi s equ ati on of s tate is di sc usse d in de tail. Expe rim ent a l data in th e crit ica l regions of CO2, Xe , a nd He 4 a re the n a nalyzed us in g a c lose d -form exp ression for th e c he mi cal pote nti a l as a fun c tion of de nsit y an d te mpe rature, b ased on sca lin g id eas. Agr ee me nt bet wee n th e proposed equati on and th e experime nt al dat a is fo und fo r th e three s ubs ta nces_ Th e res ult s of the scalin g of 1ljJ. , IIp, t da ta a re sho wn not to be in co nt rad ic ti on with the a na lys is, a lso base d on sca lin g ideas, of indepe nde nt expe rim e nt al meas ure ment s of both spec ifi c hea t a nd va por press ure.

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