Ch 6: Equilibrium

Question 1

law of mass action

Answer 1

gives expression for the equilibrium constant, Keq

reaction quotient Q has same form but can be calculated at any concentration of reactants and products

Question 2

Q is calculated value that

Answer 2

relates the reactant and product concentrations at any given time

Question 3

Keq is the

Answer 3

ratio of products to reactants at equilibrium, with each species raised to its stoichiometric coefficient. it is constant at a constant temperature

Question 4

do not appear in the law of mass action; only gases and aq do

Answer 4

pure s and l

Question 5

if Q

Answer 5

delta G

Question 6

if Q>Keq

Answer 6

delta G > 0 and reaction proceeds in the reverse direction

Question 7

Le Chateliers principle

Answer 7

when chem system experiences a stress, it will react to restore equilibrium

Question 8

_____ the concentration of reactants or ____ the conc or products will shift the reaction to the _____ and vis versa

Answer 8

increasing
decreasing
right

Question 9

____ the pressure on a gaseous system (dec volume) will shift the reaction toward the side
____ and vis vera

Answer 9

increasing

with fewer moles of gas

Question 10

____ the temperature of an endothermic reaction or ____ the temperature of an exothermic reaction will shift the reaction to the right or vis versa

Answer 10

increasing

decreasing

Question 11

kinetic products are higher in ____ than thermodynamic products and can form at ____. Called fast products bc they can form more quickly under such conditions

Answer 11

free energy

lower temperatures

Question 12

thermodynamic products are ____ in free energy than kinetic products and therefore more ___. despite proceeding more slowly than kinetic, the thermo pathway is more ___

Answer 12

lower

stable

spontaneous (more negative delta G)

Question 13

reactions can have both kinetic and thermodynamic products that are regulated by

Answer 13

temperature and the presence of a catalyst