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Use the table of standard entropy values to determine ΔSºreaction for the following reaction:

2CH3OH(l) + 3O2(g) → 2CO2(g) + 4 H2O(g)

A+70.627 J/molK

B– 70.627 J/molK

C+313.766 J/molK

D–313.766 J/molK

Verified Answer :

Edufirst


Standar molar entropies from a table:

CH3OH (l): 126.8 J / Kmol
O2 (g): 205.1 J/ Kmol
CO2(g): 213.7 J/Kmol
H2O(g): 188.8 J/Jmol

Now use the coefficients of the reaction and sum the product entropies less the reactant entropies:

4188.8 + 2213.7 - 3205.1 - 2 126.8 = 313.7 J/molK

Answer: option C) +3173.766 J/molK


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