5.2.2 Enthalpy and Entropy

Question 1

entropy, S, is

Answer 1

a measure of the dispersal of energy in a system.

the greater the entropy, the greater the disorder

Question 2

ΔS =

Answer 2

∑S(products) - ∑S(reactants)

Question 3

ΔS =

Answer 3

ΔH - TΔS

Question 4

what must ΔG be for a reaction to be feasible

Answer 4

ΔG < 0

Question 5

what are the limitations of predictions made by ΔG?

Answer 5

even if ΔG < 0, a reaction may not take place spontaneously as it may have a very large Ea, which results in a slow ROR. Catalysts can be used to lower Ea, then the reaction will occur