40. Solving a chemistry problem

5. Using the consequences of the Hess law, calculate the changes in the enthalpy, entropy and Gibbs energy of the reaction from the known values of ∆Norev, Sorev, ∆Gorev (see Table 1 in the Appendix)

c) 2KI(p-p) Cl2(g)→2KCl(p-p) I2(s)
I) Ba2 (solution) SO42- (solution) → BaSO4(s)