Chapter 15

Question 1

Chemical equilibrium

Answer 1

A state in which the forward and reverse reactions are occurring at the same rate.

Question 2

Haber process

Answer 2

N2(g)+3H2(g) = 2NH3(g)

Question 3

Law of mass action

Answer 3

The relationship between the concentrations of the reactants and products of a systen at equiliberium.

Question 4

Equilibrium constant expression for (A+bB = dD+eE)

Answer 4

Kc= [D]^d[E]^e / [A]^a[B]^b

Question 5

Kc is a dimentionless constant called the ______

Answer 5

equiliberium constant

Question 6

Kp=_____

Answer 6

Kc(RT)^delta n

Question 7

Kp=

Answer 7

(PD)^d(PE)^e /(PA)^a (PB)^b

Question 8

The value of the equilibrium constant changes with temperature. A large value of Kc indicates that the equiliberium mixture contains more products/reactant than reactants/products.

Answer 8

products

reactants

Question 9

If a reaction is the sum of two or more reactions, its equilibrium constant will be the product of the equilibrium constants for the individual reactions.

Answer 9

.

Question 10

Equiliberia for which all substances are in the same phase are called ________

Answer 10

homogeneous equilibria

Question 11

In _________ _______ equilibria , two pr more phases are present.

Answer 11

heterogeneous equiliberia

Question 12

liquids and solids are included/excluded by the equilibria constant expression for a heterogenious equiliberium

Answer 12

excluded (because their activities = 1)

Question 13

Stoich matters for calculating concentrations

Answer 13

true dat

Question 14

The reaction quotient is denoted :

Answer 14

Q

Question 15

Q is calculated by substituting reactant and product concentrations or partial pressures at any point during a reif action into the equil constant expression

Answer 15

.

Question 16

if the system is at equilliberium ______

Answer 16

Q=K

Question 17

if Q does not equal K the system is/is not at equilliberium

Answer 17

is not.

Question 18

When Q<K the reaction will move toward equilliberium by forming more products/reactants

Answer 18

products (left to right)

Question 19

When Q>K the reaction will move toward equilliberium by forming more products/reactants

Answer 19

reactants (right to left)

Question 20

Le Chaterlier’s principle States

Answer 20

If a system at equlibrium is disturbed, the quilibrium will shift to minimize the disturbing influence.

Question 21

If a reactant or product is added to a system at equiliberium, the system will compensate forming a new equilliberium.

Answer 21

true dat mutha man

Question 22

If volume is reduced the system

Answer 22

will shift in the direction that reduces gas molecules

Question 23

Changes in pressure and concentration do/do not effect the K value

Answer 23

it’s constant bitch

do not

Question 24

For an endothermic reaction an enthalpy change, an increase/decrease in temperature will shift the equation right

Answer 24

increase

a decrease will shift it left

Question 25

For an exothermic reaction an enthalpy change, an increase/decrease in temperature will shift the equation left

Answer 25

increase

a decrease will shift it right

Question 26

Catalysts simply effect the _____ at which equillibrium is reached but do not affect the magnitude of _

Answer 26

speed

K