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H2(g) + Br2(g) → 2HBr(g)
The above reaction is...

H2(g) + Br2(g) → 2HBr(g)
The above reaction is carried out at 25oC. ΔH is -72 kJ mol-1 and ΔS is - 106 J mol-1K-1, the reaction will?

A.

not proceed spontaneously at the given

B.

proceed spontaneously at the given temperature

C.

proceed in the reverse direction at the given temperature

D.

proceed spontenously at lower temperature

Correct answer is B

 Where ∆G = ∆H - T∆S

Given data; ∆G = ?

∆H = -72KJ/mol, 

T→ (25+273)K = 298K

∆S = -106J/mol or -0.106KJ/mol/K

: ∆G = -72 -(298 * -0.106)

= -72 + 31.588

∆G = -40.412KJ/mol

One of the condition for spontaneity of a reaction as ∆G to be negative.