$(25)$ a$)$ Calculate the value of standard molar Gibbs free energy change of the chemical

reaction at $298K$ using the data given:

Is the chemical reaction exothermic reaction or not? WHY?

$Zr{O}_2()+2CO(g)Zr()+2C{O}_2(g)at298K$

b$)$ Calculate the enthalpy and entropy of chemical reaction at $1700K.$ Leave

calculations in the integral form after putting cp values. Organize them as we do it in the

class.

$Zr{O}_2()+2CO(g)Zr()+2C{O}_2(g)at1700K$

DATA:

$HZr()=3900$ joules at $1136K,$

$HZr{O}_2()=5900$ joules at $1478K$

Standard molar enthalpy formation and entropy at $298K$ :

$H_{f}Zr{O}_2()=-1100800$ joules, $SZr()=39\frac{J}{K},SZr{O}_2()=50\mathrm{.}4\frac{J}{K},H_{f}CO(g)=-110500J$

SCO$(g)=197\mathrm{.}5\frac{J}{K},HfC{O}_2(g)=-393500J,SC{O}_2(g)=213\mathrm{.}7\frac{J}{K}$