entropy & feasibility

entropy definition

quantitative measure of disorder in a system (JK^-1mol^-1) more disorder higher entropy higher temp

standard entropy definition

entropy content of 1mol of substance under standard conditions

is entropy always +ve or always -ve

always +ve as all substances possess a degree of disorder

what is the type of entropy from solid to liquid

entropy of fusion

what is the entropy liquid to gas

entropy of vaporisation , (greater than entropy of fusion)

Total entropy equation

S(total)= S(products)- S(reactants)

all spontaneous reactions have ____ entropy

+ve

at 0K perfect crystals have

0 entropy

free energy change equation

G= H-TS

a process takes place spontaneously/ is feasible when

G<0

visual for gibbs

Gibs feasibility table

when finding T

set G=0

reactions occurring depends on

• activation energy

• slow rate of reaction