Estimating Entropy Changes
?S for phase Changes
- ?Hvaporization for benzene is 30.9 kJ/mol at 80.1?C
- ?S = 30.9 / (80.1 + 273.1) = 0.0875 kJ/K-mol
Is Entropy for products greater or smaller than reactants?
- CO2(g) ? CO2(s)
- KCl(s) ? KCl(aq)
- MgCO3(s) + heat ? MgO(s) + CO2(g)