Chapter 19 Section 4Entropy

-a quantitative measure of the disorder of a system

Entropy= S units= J/Kmol

Standard entropy = S0

*this is at 25°C and 101.3kPa

∆ S0 = ∑S0(products) - ∑S0(reactants)

(-) = decrease in entropy

(+) = increase in entropy

**equations must be balanced

**coefficient from balanced equation goes in front of S0

-chart page 558