What is the ∆G for the following reaction under nonstandard conditions where the following data is given?
2NH4Cl(s) + CaO(s)
CaCl2(s)+ H2O + 2NH3(g)

Given:
CaO: ∆Hf = -635.09 kJ, ∆Sf =39.75 J/K
CaCl2: ∆Hf = -795.8 kJ, ∆Sf =104.6 J/K.
NH3: ∆Hf = -46.11 kJ, ∆Sf = 192.45,
H2O: ∆Hf = -285.830 kJ, ∆Sf = 69.91 ,
NH4Cl: ∆Hf = -314.43 kJ, ∆Sf = 94.6
A.
2.27 J
B.
-4.54 J
C.
4.54 J
D.
9.08 J
E.
-9.08 J