Phosphorus and Chlorine Gases Combine to Produce Phosphorus Trichloride: P₂(g)

Phosphorus and chlorine gases combine to produce phosphorus trichloride: P₂(g) + 3Cl₂(g) → 2PCl₃(g)
Δ_rG° at 298 K for this reaction is -642.9 kJ mol^-1. The value of Δ_rG at 298 K for a reaction mixture that consists of 1.5 atm P₂, 1.6 atm Cl₂, and 0.65 atm PCl₃ is ________ kJ mol^-1.

A) -44.2
B) -3.88 × 10³
C) -7.28 × 10³
D) -708.4
E) -649.5