Chem Test 4th Quarter

Question 1

How to find Activation Energy

Answer 1

transition state-reactants

Question 2

How to find Activation Energy for the reverse reaction

Answer 2

transition state-products

Question 3

how to find delta E (^E)

Answer 3

products-reactants

Question 4

describes a process or reaction in which the system absorbs energy from its surroundings, products are higher than reactants

Answer 4

endothermic process

Question 5

is a chemical reaction that releases energy by light or heat, reactants are higher than products

Answer 5

exothermic process

Question 6

the study of how fast a reaction proceeds and what happens to reactants as they turn to products

Answer 6

chemical kinetics

Question 7

A single molecular event, such as the collision of molecules, resulting in a reaction

Answer 7

elementary reaction

Question 8

the step by step sequence of reactions by which the overall chemical change occurs

Answer 8

reaction mechanism

Question 9

a species that appears in some steps, but not in the equation

Answer 9

reaction intermediate

Question 10

the reactants and products all exist in a single phase

Answer 10

homogeneous reaction

Question 11

in order to occur, reactants molecules must collide with an energy greater than some minimum value and with the proper orientation

Answer 11

collision theory

Question 12

the minimum energy required for two molecules to react

Answer 12

activation energy

Question 13

unstable grouping of atoms that can break up to form products

Answer 13

activated complex

Question 14

factors influencing the rate of a reaction

Answer 14

1. higher temps
2. increased concentration of reactants
3. increased surface area
4. nature of reactants
5. cataylst

Question 15

the equation that relates the rate of a reaction to the concentrations of reactants and catatlysts rasied to various powers

Answer 15

rate law

Question 16

rate law equation

Answer 16

rate=K[A}^m[B]^n[C]^p

Question 17

equation to find K

Answer 17

k= Rate/(conA)(conB)

Question 18

rate determining step in a reaction mechanism

Answer 18

the slowest step

Question 19

what order is a reactant with no coefficiants?

Answer 19

first order

Question 20

the same as or an integer multiple of the empirical formula

Answer 20

molecular formula

Question 21

the formula of a substance written with the smallest whole number ratio

Answer 21

empirical formula

Question 22

a reaction intermediates get ____ out in an equation

Answer 22

canceled

Question 23

How many different nonmetals bond to form a binary molecular compound?

Answer 23

2

Question 24

If their are 2 reactants in a process, the molecularity of that rate determining step is

Answer 24

bimolecular

Question 25

Do practice with rate laws

Answer 25

.

Question 26

Do practice with % composition

Answer 26

.

Question 27

Do practice with empirical formulas

Answer 27

.

Question 28

the sum of the average atomic masses of all the atoms represented in its formula

Answer 28

formula mass

Question 29

the % by mass of each element in a compound

Answer 29

percent composition

Question 30

the change in concentration of reactants per unit time as a reaction process

Answer 30

reaction rate

Question 31

reactants in different phases

Answer 31

heterogeneous

Question 32

the power to which a reactant is raised to

Answer 32

order