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A quantitative analysis is made on the correlation ship of thermodynamic property, i.e., standard enthalpy of formation (ΔH f 0 ) with Kier's molecular connectivity index( 1 X v ),vander waal's volume (Vw) electrotopological state index (E) and refractotopological state index (R) in gaseous state of alkanes. The regression analysis reveals a significant linear correlation of standard enthalpy of formation (ΔH f 0 ) with 1 X v , Vw, E and R. The equations obtained by regression analysis may bedoi:10.1590/s0100-46702010000300007 fatcat:tfeayspg7nayrgjp2654e6gwvu