Chemical Equilibrium

Flashcards in the fill-in-the-blank style

__ reactions are reactions where the reactants convert to products but the products are then converted back into the reactants.

Reversible

__ reactions are reactions where the reactants convert to products and the products cannot then be converted back to the reactants.

Irreversible

The equilibrium is a __ equilibrium, because the rate of formation of products via the forward reaction is equal to the rate at which the products re-form reactants via the reverse reaction.

dynamic

A __ equilibrium involves a reversible reaction in a closed system.

dynamic

In a reaction at equilibrium, the rate of the forward reaction is equal to the __ reaction

backward

Kc is called the .

equilibrium constant

A __ reaction is one in which all the reactants and products are in the same physical state.

Homogenous

A __ reaction is one in which the reactants and products are in different physical states.

Heterogeneous

If K > 1 then at equilibrium then there are more __ than reactants

products

If K < 1 then at equilibrium then there are more __ than products

reactants

When a system in equilibrium is subjected to __ the system tends to alter to relieve the stress.

stress

According to Le Chatelier's Principle, factors which may affect the position of equilibrium are: __, __, __.

temperature, pressure, concentration

An increase in the concentration of a reactant will move the position of equilibrium from to .

left, right

An increase in total pressure moves the position of the equilibrium to the side with the __ moles of gas.

fewer

A catalyst speeds up the reaction by providing an alternative pathway, which has __ activation energy.

lower

__ catalysts are in the same phase as the reaction mixture.

Homogeneous

__ catalysts are found in a different phase than the reactants.

Heterogeneous

In biochemical reactions, there are more than a thousand different catalysts — these are known as __.

enzymes

A __ temperature is a compromise between rate of reaction and yield

compromise

A __ pressure is a compromise between yield and expense

compromise