Cisplatin [cis-diamminedichloroplatinum(II)] is a potent treatment for certain types of cancers, but the trans isomer is not

Question:

Cisplatin [cis-diamminedichloroplatinum(II)] is a potent treatment for certain types of cancers, but the trans isomer is not effective. What is the equilibrium constant at 298 K for the transformation of the cis to the trans isomer? Which is the favored isomer at 298 K, the cis or the trans isomer? Compound Cis-Pt (NH3)2Cl2 Trans-Pt(NH3)2Cl2 A H AfG (kJ/mol,298 K) (kJ/mol, 298 K) -467.4 -480.3 -228.7 -222.8