International Science Community Association Research Journal of Chemical Sciences 2231-606X 14 1 2024 02 18 Theoretical estimation of heat capacity of binary liquid mixtures at different temperatures by associated and non associated processes 16 20 EN Zaware Sandeep 1 Synergen Bio Private Limited, Unit Nos. 101 to 104 and 309 to 311, Sai Chambers, 302, Old Mumbai – Pune, India Highway, Wakadewadi, Shivajinagar, Pune, Maharashtra - 411003, India Lahoti Neel 2 Synergen Bio Private Limited, Unit Nos. 101 to 104 and 309 to 311, Sai Chambers, 302, Old Mumbai – Pune, India Highway, Wakadewadi, Shivajinagar, Pune, Maharashtra - 411003, India Mohammed Aliyu Danmusa 1 Department of Chemistry, Umaru Musa Yar’adua University, Katsina, Katsina State, Nigeria Yusuf Amina Sada 2 Department of Chemistry, Umaru Musa Yar’adua University, Katsina, Katsina State, Nigeria Adam Ansar Bilyaminu 3 Department of Chemical Sciences, Federal University Wukari, Taraba State, Nigeria Awasthi Naveen 1 Department of Chemistry, Janta College Bakewar (206124), Etawah, India Mishra Divya Jyoti 2 Department of Agriculture Chemistry, Janta College Bakewar (206124), Etawah, India Dwivedi Nalini 3 Department of Chemistry, Raghunath Girls P.G. College, Meerut (250001), India Pandey Vivek Kumar 4 Department of Chemistry, D.B.S P.G. College, Govind nagar (208006), Kanpur, India > Research Paper 2023 10 5 2024 02 18 In the present investigation experimental density (ρ), ultrasonic speed (U), thermal expansion coefficient (α) isothermal compressibility (βT), characteristic pressure (P*), characteristic volume (V*) and characteristic temperature (T*) were used to evaluate heat capacity (CP) of two weakly interacting binary liquid mixtures such as 1-butanol+dodecane and 2-butanol+dodecane over the entire range of concentration and atmospheric pressure from 288.15-318.15K by Prigogine-Flory-Patterson model based on non- associated process. Ramaswamy (RS) as well as model devised by Glinski (GLI) based on association process were also considered for evaluation of aforementioned thermodynamic properties at different temperatures. Deviations of heat capacity were fitted to redlich kister polynomial to estimate the binary coefficient and standard deviation. McAllister Multi body interaction model was used to correlate the experimental findings. Results were discussed in terms of average absolute % deviation for both the liquid mixtures at different temperatures. McAllister four body (Mc4) was found to be more consistent than McAllister three body (Mc3) model. Excess heat capacities of binary liquid mixtures were also computed to analyze the intermolecular interactions. Prigogine-Flory-Patterson model deals a fair agreement with experimental findings in comparison to other two models based on associated process. Copyright@ International Science Community Association