Calculate Δ_rG at 298 K Under the Conditions Shown Below

Multiple Choice

Calculate Δ_rG at 298 K under the conditions shown below for the following reaction: SO₃(g) + H₂O(g) → H₂SO₄(l) Δ_rG°= -90.5 kJ mol^-1
P(SO₃) = 0.20 atm, P(H₂O) = 0.88 atm

A) +15.9 kJ mol^-1
B) -90.5 kJ mol^-1
C) +51.4 kJ mol^-1
D) -86.2 kJ mol^-1
E) -30.4 kJ mol^-1