(x1) α  х 103 (deg-1) βT х 1012 (cm2 dyne-1) Pint х 10-9 (dyne cm-2) γ Г %D βT 0.2979 1.190 105.2 3.371 1.424 1.195 6.32 0.3162 1.194 106.4 3.343 1.425 1.193 6.31 0.3325 1.196 107.3 3.322 1.427 1.197 6.41 0.3519 1.200 108.5 3.295 1.429 1.199 6.54 0.3709 1.203 109.7 3.267 1.431 1.201 6.68 0.3902 1.206 111.0 3.240 1.432 1.201 6.86 0.4029 1.199 111.9 3.220 1.434 1.214 6.90 0.4282 1.212 113.2 3.192 1.436 1.206 7.03 0.4484 1.206 114.6 3.163 1.438 1.218 7.18 0.4684 1.210 116.0 3.133 1.440 1.219 7.32 0.4874 1.222 117.0 3.135 1.442 1.213 7.42 0.5023 1.231 120.2 3.051 1.450 1.226 7.73 0.5227 1.225 121.8 3.020 1.452 1.237 6.47 0.5442 1.238 123.1 2.997 1.457 1.238 8.00 0.5446 1.242 124.7 2.968 1.456 1.231 8.15 Average percent deviation =7.04 List of abbreviations used in Table х: Mole fraction ρ: Density u: Ultrasonic velocity α: Thermal expansion coefficient βT: Isothermal compressibility Pint: Internal pressure γ: heat capacity ratio Г: Pseudo gruneisen parameter

Table 2: Calculated values of α, βT, Pint, γ and Г of binary system— n-heptane(x1) + toluene at 298.15 K.