EXAM TWO

Question 1

What is the equation for rate?

Answer 1

rate = k[A][B]

Question 2

What do you leave out of K equations?

Answer 2

reactants and products that are in solid or liquid phases

Question 3

What is the only factor that can change the value of K?

Answer 3

temperature

Question 4

What happens if you add multiple balanced equations together?

Answer 4

multiply K

Question 5

What happens when you reverse the balanced equation?

Answer 5

take the inverse of K

Question 6

What happens when you multiply the balanced number by a number?

Answer 6

raise K to the power of that number

Question 7

What is happening when Qc>Kc?

Answer 7

left running/towards reactants

Question 8

What is happening when Qc<Kc?

Answer 8

right running/towards products

Question 9

What is happening when Qc=Kc?

Answer 9

the reaction is at equilibrium

Question 10

What happens to reaction when the concentration of the products increases?

Answer 10

shifts to left

Question 11

What happens to reaction when the concentration of the products decreases?

Answer 11

shifts to the right

Question 12

What happens to reaction when the concentration of the reactants increases?

Answer 12

shifts to right

Question 13

What happens to reaction when the concentration of the reactants decreases?

Answer 13

shifts to left

Question 14

What happens to the reaction when the pressure increases?

Answer 14

shift to side with fewest moles of gas

Question 15

What happens to the reaction when the pressure decreases?

Answer 15

shift to side with most moles of gas

Question 16

What happens to the reaction when the volume increases?

Answer 16

shift to side with most moles of gas

Question 17

What happens to the reaction when the volume decreases?

Answer 17

shift to side with fewest moles of gas

Question 18

What does is mean when there is a +∆H?

Answer 18

reaction is endothermic, energy into the system

Question 19

What does is mean when there is a -∆H?

Answer 19

reaction is exothermic, energy out of the system

Question 20

What happens when the temperature increases in an exothermic reaction?

Answer 20

K down = shift to the left

Question 21

What happens when the temperature increases in an endothermic reaction?

Answer 21

K up = to the right

Question 22

What happens when the temperature decreases in an exothermic reaction?

Answer 22

K up = shift to the right

Question 23

What happens when the temperature decrease in an endothermic reaction?

Answer 23

K down = shift to the left

Question 24

What happens to the reaction when you add a catalyst?

Answer 24

no change

Question 25

What is an intermediate?

Answer 25

made in an early step and used up later on (doesn’t appear in overall balanced equation)

Question 26

What is a catalyst?

Answer 26

used up and later remade (doesn’t appear in overall balanced equation)