Apply
dSrxn = S-products - S-reactants
dSrxn = (3*CO2 + 4*H2O) - (C3H8 + 5*O2)
substitute known data
dSrxn = (3*21.8+ 4*70) - (270.3+ 5*205.2)
dSrxn = -950.9 J/molK
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Part A:
Part B:
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