standard molar entropy question...?

Question

For the gaseous reaction of xenon and fluorine to form xenon hexaflouride:
Calculate DSo at 298 K (DH = -402.0 kJ/mol and DGo = -280.0 kJ/mol).
Enter units as J/K/mol.

ACK! Finals on SAT! Thanks for the help.......

Also: Assuming DSo and DH change little with temperature, calculate DGo at 783.0 K.

Answer 1

/\G = /\H - T/\S