GENCHEM 16,17,18,19,20

binding site

- a region on a macromolecule that binds to another molecule with specificity.

C. 1/2; 1; 3/2

4. For the rate law Rate = k[A]1/2[B], the partial order with respect to A is____, the partial order with respect to B is ____, and the total order is ____.

d. decreasing the activation energy of the overall reaction

A catalyst increases the rate of a reaction by

A. remain constant

A reaction was found to be zero order in A. Increasing the concentration of A by a factor of 3 will cause the reaction rate to

is the minimum amount of energy that reactant particles must have to initiate the reaction

ACTIVATION ENERGY

c. all collisions are successful

All of the following statements are correct about effective collisions EXCEPT

positive catalyst) is a substance that can speed up a chemical reaction without itself being used up in the reaction

CATALYST

is the branch of science that deals with the study of the rate by which the products are formed and the mechanism by which a reaction takes place

CHEMICAL KINETICS

are catalysts in biological systems.

ENZYMES

Catalysts

Enzymes are examples of

d. sufficient kinetic energy and favorable geometry

For collisions to be successful, reactants must have

C. 1; 3/2; 5/2

For the rate law Rate = k[A][B]3/2, the order with respect to A is ______, the order with respect to B is ______, and the overall reaction order is _______.

B. the reaction is second order in [C]

For the reaction 2A + B + 2C D + 2E, the rate law is: rate =k[A]2 [B]1 [C]1 Which of the following statements is false?

B. decrease, 2

Given A +3B 2C + D. This reaction is first order with respect to reactant A and second order with respect to reactant B. If the concentration of A is doubled and the concentration of B is halved, the rate of the reaction would _____ by a factor of _____.

first

Given the following data, determine the order of the reaction with respect to NO2- . NH4+ (aq) + NO2- (aq) → N2(g) + 2H2O(g)

is a substance that can retard a chemical reaction without itself being used up in the reaction.

INHIBATOR

b. with enzyme

In which of the following sample will there be an increase in the rate of reaction?

is the change in the concentration of the reactants and products per unit time.

REACTION RATE

d. Heat makes the particles of the reactants move more rapidly, which enhances the possibility of collisions.

Rate of a chemical reaction increases with a rise in the temperature of the reactants because

d. reaction mechanism

The _____________ is a chemical species with partially broken and partially formed bonds which possess high energy.

d. activated complex

The activation energy of a reaction is the amount of energy necessary to form the

a. Increasing the volume that the reactants occupy

The addition of a catalyst in a reaction

a. lowers activation energy and speeds up the reaction

The addition of a catalyst in a reaction

d. activation energy.

The energy needed for a reaction to proceed from reactants to products is called

a. activation energy.

The minimum amount of energy needed to start a reaction is called the

d. all of the above

The rate of a reaction depends on __________. a. collision frequency b. collision orientation c. collision energy d. all of the above

a. Positive catalyst

What type of catalyst decreases the activation energy by accepting an alternative path for the reaction to occur?

b. supplies the activation energy

When a lit match is touched to the wick of a candle, the candle begins to burn. When the match is removed, the candle continues to burn, the match,

a. Those which exist in the same phase (gas or liquid) as the reactant

Which is a homogeneous catalyst?

a. catalytic converter in gasoline or diesel fueled car

Which is a homogeneous catalyst?

a. catalytic converter in gasoline or diesel fueled car

Which is an example of heterogeneous catalyst?

D. the rate is constant

Which is true for all zero-order reactions?

c. Adding a catalyst for the reaction

Which of the following conditions shall correctly complete the statement? __________ will lower the activation energy for a reaction.

b.the rate is independent of the concentration of the reactant(s)

Which of the following is NOT true for first order reaction?

b.The rate depends on the concentrations of two different reactant

Which of the following is TRUE for second-order reactions?

a) It participates in the reaction

Which of the following is not a characteristic of a catalyst?

c. placing it in the refrigerator

Which of the following reactions will delay the decay of fruit?

a. Any chemical reaction results in the breaking of some bonds (which requires energy) and the formation of new ones (which releases energy)

Which of the following statements is correct about chemical reaction and molecular collision?

d. Grinding the reactants.

Which of the following will hasten the rate of reaction?

a. Increasing the volume that the reactants occupy

Which of the following will slow down a chemical reaction?

d. Increasing the volume that the reactants occupy

Which of the following will slow down a chemical reaction?

d. increasing the volume of the container

Which of the following would NOT increase the rate of reaction?

b. Heat makes the particles of the reactants move more rapidly, which enhances the possibility of collisions.

Why does the rate of a chemical reaction increase with a rise in the temperature of the reactants?

Energy profile

a diagram representing the energy changes that take place during a chemical reaction.

Endothermic Reaction

a reaction that releases energy

nuclear decay

also called radioactive decay, this occurs when the nucleus of an atom is unstable and spontaneously emits energy in the form of radiation.

Catalysts

are molecules that speed up the reaction rate without being consumed by the reaction

Catalyzed Reactions

are reactions with catalyst

Uncatalyzed Reaction

are reactions without a catalyst.

Positive catalyst

decreases or slows down chemical reaction by increasing activation energy needed for the reaction to occur.

Effective collision

defined as one in which molecules collide with sufficient energy and proper orientation, so that a chemical reaction occurs.

Ineffective collision

defined as one in which molecules collide, but no chemical reaction occurs.

A. zero-order reaction

he rate for this reaction order is independent of concentration

Heterogenization

homogeneous catalytic system is a modification of homogeneous catalysts to "break" the uniformity among the molecules of the catalyst and the product by rendering them in separate phases to allow their separation.

Activated complex

is a chemical species with partially broken and partially formed bonds which possess high energy.

Induced catalyst

is a substance that influences the speed of a reaction which is not posible under ordinary condition.

Heterogeneous catalysis

is catalysis in which the catalyst does not take part in the reaction that it increases.

Activation energy (Ea)

is the minimum energy (kinetic or potential) required to initiate a reaction.

Homogeneous catalysis

occurs when the reactants, products and catalyst are all in the same phase.

Reaction order

the power to which the concentration of a given reactant is raised in the rate law.

Auto-catalyst

the product formed in the reaction act as catalyst for the reaction to proceed.

Biocatalyst

the substance, such as enzymes or hormones, that initiates or increases the rate of chemical reaction.

b. Particles that lack the necessary kinetic energy may collide and will not result to a chemical reaction

which of the following statements is incorrect about chemical reaction and molecular collisio

a. adding a catalyst b. adding more reactants c. grinding the reactants D. maintaining the temperature constant

will not change the rate of a reaction?