Q$\mathrm{.}2)$ The partial molar enthalpy $(k\frac{J}{m}ot$ of species $1$ in a binary mixture is given by $\frac{?}{\text{b}\text{a}\text{r}}(n{)}_1=2-60x_2^2+100x_1{x}_2^2.$ The partial molar enthalpy species $1$ at infinite dilution.