kinetics and equilibrium

Question 1

what does kinetics study

Answer 1

the rates of chemical reactions

Question 2

what must particles do to react

Answer 2

collide

Question 3

effective reaction leads to a

Answer 3

reaction

Question 4

ineffective reaction leads to

Answer 4

no reactions

Question 5

what conditions must be met to have an effective collision

Answer 5

particles collide with enough energy and particles must have proper orientation

Question 6

if particles must collide to react, then more collisions equal

Answer 6

faster reaction rate

Question 7

increased temperature in a reaction causes

Answer 7

increased average kinetic energy = particles move faster

Question 8

increased concentration in reactions mean

Answer 8

more molecules present in the same amount of space

Question 9

increased pressure in reactions causes

Answer 9

gas molecules to become closer together

Question 10

what 4 conditions lead to a fast reaction rate

Answer 10

increased temperature, increased concentration, increased surface area, increased pressure

Question 11

when bonds are broken energy is

Answer 11

absorbed

Question 12

when bonds are formed energy is

Answer 12

released

Question 13

what do chemical bonds contain

Answer 13

potential chemical energy

Question 14

what is heat of reaction formula

Answer 14

Hproducts - Hreactants

Question 15

exothermic equals

Answer 15

release energy

Question 16

endothermic equals

Answer 16

absorb energy

Question 17

what does a catalyst do

Answer 17

speeds up the rate of reaction but doesn’t affect the number of collisions

Question 18

a catalyst provides

Answer 18

alternate pathway for a reaction with a lower activation energy

Question 19

enthalpy is

Answer 19

energy

Question 20

entropy is

Answer 20

randomness or disorder

Question 21

when does enotropy increase

Answer 21

when gas is formed and when molecules break apart

Question 22

what do systems in nature favor

Answer 22

low enthalpy and high entropy

Question 23

what is equilibrium

Answer 23

when the rate of the forward reaction equals the rate of the reverse reaction

Question 24

what are the three types of equilibrium

Answer 24

phase, solutions, chemical

Question 25

when is a solution at equilibrium

Answer 25

when its saturated

Question 26

what is phase equilibrium

Answer 26

rate of one phase changing to another and back is the same

Question 27

what Is chemical equilibrium

Answer 27

when rate of forward reaction is equal to the rate of the reverse reaction

Question 28

reactions that are at equilibrium will stay at equilibrium unless

Answer 28

a stress causes the equilibrium to shift

Question 29

what will concentrations change do

Answer 29

shift in the direction that relieves the stress

Question 30

what does temperature change do

Answer 30

increased rate of all reactions

Question 31

increased temperature favors

Answer 31

endothermic

Question 32

decreased temperature favors

Answer 32

exothermic

Question 33

what does pressure change do

Answer 33

increased in pressure favors the side with less gas moles