# Equilibria Flashcards

Define dynamic equilibrium

The rate of reactions (forwards and backwards) are equal and therefore concentrations of reactants and products are equal.

Define homogeneous equilibrium

Reactants and products are in the same physical state

What factors affect equilibrium?

Temperature, pressure (gas only), concentration (solution only), presence of a catalyst

What is the Kc equation?

Kc = ([C]^n x [D]^n) / ([A]^n x [B]^n)

What is the Kp equation?

Kp = (pC^c x pD^d) / (pA^a x pB^b)

What is the mole fraction equation?

Number of moles of a particular gas / total moles of all gases in mixture

What is the equation for partial pressure?

Mole fraction x total pressure

Define partial pressure

Pressure exerted by a particular gas in a mixture in a closed system

Define total pressure

Sum of all partial pressures

When is the reaction quotient the same as the equilibrium constant?

Only at equilibrium

What is Le Chatalier’s principle?

System reacts to oppose the change