If the reaction:
H2(g) + I2(g) 2HI(g)
has a Kc = 54.8 at 450°C, then what is the free energy of the reaction? (The value of the gas constant, R, is 0.008314 kJ/K •mol).

-15.0 kJ/mol


-24.1 kJ/mol


-10.5 kJ/mol


-6.5 kJ/mol