Delta S Thermo Chem

Question

Calculate ΔS° in J/mol K for the following reactions at 25.0°C using the standard entropies of the reactants and products.

2CH_3OH(l)+3O_2(g)→2CO_2(g)+4H_2O(l)

Answer 1

You need to look up the values for the standard entropies of the reactants and products.

2 x ∆Sº for CO2(g) + 4 x ∆Sº for H2O(l) = entropy for the products

2 x ∆Sº for CH3OH(l) + 3 x ∆Sº for O2(g) = entropy for the reactants

Entropy of reaction = entropy for the products - entropy for the reactants