Phosphorous and Chlorine Gases Combine to Produce Phosphorous Trichloride: P₂

Phosphorous and chlorine gases combine to produce phosphorous trichloride: P₂ (g) + 3Cl₂ (g) → 2PCl₃ (g)
ΔG° at 298 K for this reaction is -642.9 kJ/mol. The value of ΔG at 298 K for a reaction mixture that consists of 1.9 atm P₂, 1.6 atm Cl₂, and 0.65 atm PCl₃ is ________.

A) -34.9
B) -4.46 × 10³
C) -7.86 × 10³
D) -714.1
E) -650.1