Calculating the Standard Entropy of Reaction, _Sorxn
Solution: Calculate _ Sorxn using Appendix B values,
Rxn #1
Sorxn = ( 8 mol SO2 x So of SO2) - [(1 mol S8 x So of S8) +
( 8 mol O2 x So of O2)]
= ( 8 mol x 248.2 J/mol K) - [(1 mol x 430.211 J/mol K)
+ (8 mol x 205.0 J/mol K)]
= (1,985.6 J/K) - [(430.211 J/K) + (1,640.0 J/K)]
= 1985.6 J/K - 2,070.211 J/K = - 84.611 J/K
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