$7.)$a$)$ Calculate the partial molar Gibbs free energy and entalphy of $Fe$ and $Si$ and

b$)$ Gmixing and $H$ mixing for $Fe-Si$ liquid solution at $x_{Si}=0\mathrm{.}05$ and $1100K.$

Silicon obeys Henrian law and Henrian activity coefficient varies with temperature as below: $logSi=-\frac{6230}{T}+0\mathrm{.}37$

Hint: use $\frac{d\frac{G}{T}}{d}T=-\frac{H}{T^2}$ Gibbs$-$Helmoltz eq$.$ for all $($partial and $$ Gmixing$)$