Δg o for the reaction h2(g) + i2(g) ⇌ 2hi(g) is 2.60 kj/mol at 25°c. calculate δg o , and predict the direction in which the reaction is spontaneous. the initial pressures are: ph2 = 3.10 atm pi2 = 1.5 atm phi 1.75 atm δg o = the reaction is spontaneous in the forward direction. the reaction is spontaneous in the reverse direction. cannot be determined.