Assuming that hf and s values are independent of

Question

2PbS(s) + 3O2(g) = 2PbO(s) + 2SO2(g)
Hf(kj/mol) -100 0 -217.3 -296.9
Gf(kj/mol) -98.7 0 -187.9 -300.4
S(J/mol K) 91.2 205.0 68.7 248.5

Assuming that Hf and S values are independent of temperature, determine theoretically at what temp,T, will this reaction become spontaneous at standard conditions?

(A) T=122K
(B) T=278K
(C) T=5082K
(D) Such a temp. does not exist; this process is always spontaneous.