Chemical and Phase Equilibrium Flashcards
What law is the criterion for chemical equilibrium based on?
Second Law of thermodynamics
How does Gibbs Energy Change across an equilibrium reaction?
No change
What is the only factor K_P depends on?
Temperature
What do larger values of K_P indicate?
A more complete reaction
What is the van’t Hoff equation useful for?
Expressing K_P in terms of other thermochemical properties
How does increase in temperature affect combustion reactions?
They become less complete
When are two phases of a pure substance said to be in phase equilibrium?
When each phase has the same value of specific Gibb’s function
What does the Gibb’s phase rule give?
The number of independent variables associated with a multicomponent, multiphase system
When is a multi-component multi-phase system in equilibrium?
When Gibbs function of each component is same in all phases
What does Henry’s Law relate?
The mole fraction of a weakly soluble gas in liquid state to partial pressure of the gas
What does Raoul’s Law give?
The mole fraction of the species of a two phase mixture in the liquid and gas phases for a highly soluble liquid
What is the concentration of a dissolved gas in a liquid proportional to?
Partial Pressure of the gas
How does concentration of a dissolved gas in a liquid relate to Henry’s constant
Inversely proportional
What is the only factor that Henry’s constant depends on?
Temperature
What equations allow us to solve the phase equilibrium for a multi-component system?
The mass balance and the K_P relations
