Chapter 10, Problem 68E

Using thermodynamic data from Appendix 4, calculate $\Delta G°$ at 25°C for the process
${\text{2SO}}_{\text{2}}\text{(}g{\text{)+O}}_{\text{2}}\text{(}g\text{)}\to {\text{2SO}}_{\text{3}}\text{(}g\text{)}$
where all gases are at 1.00 atm pressure. Also calculate $\Delta G°$ at 25°C for this same reaction but with all gases at10.0 atm pressure.