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Answer to Question #11901 in Inorganic Chemistry for bernadette Christopher

Question #11901
The value of delta G at 373 K for the oxidation of solid elemental sulfur to gaseous sulfur trioxide,

2S (s, rhombic) + 3)2 (g) --> 2SO3 (g)

is ____ kJ/mol.

Additional Information:
(delta H of f of SO3 = -395.2, delta H of f of O2 and S = 0)
(delta G of f of SO3 = -370.4, delta G of f of O2 and S = 0)
(S of SO3 = 256.2, S of O2 = 205.0, S of S =31.88)

Answers: A) +740.8 B) -61.3 C) -740.8 D) -728.3 E) +61.3
Expert's answer
dG=dH - T x dS
dH=EdH prod-EdHreact
dH=-2*392-3*0 -2*0=-784

dG= -784 -
373*-166.36= -62.8 kJ

It is closer to B) -61.3

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