Rate Laws Collision

Which of the following statements about a chemical reaction rate is/are correct?

I. It measures the change in the concentration of a reactant or a product per unit of time

II. It measures the amount of reactant used or the amount of a product produced in a reaction

III. It measures the amount of time needed to complete the reaction

IV. It measures the energy change during the reaction per unit of time

• I only

• II and III only

• III and IV only

• I, II, III and IV

• I and III only

Tags

NGSS.HS-PS1-5

The rate law of the reaction 3X + Y --> 2Z is: Rate= k[X]²[Y]³. The overall order of this reaction is _________.

• 2

• 3

• 4

• 5

• 1

Tags

NGSS.HS-PS1-5

What is the order of a reaction with respect to reactant A if the rate law expression for the reaction is Rate=k[A][B]²?

• 1^st order

• 2^nd order

• 4^th order

• 0 order

• 3^rd order

Chemical kinetics is the study of:

I. Heat

II. Reaction Mechanisms

III. Reaction Rates

• I

• II

• III

• I and II

• II and III

Tags

NGSS.HS-PS1-5

Raising the temperature of gas particles

• Increases both collision energy and favorability of orientation

• Increases neither collision energy nor favorability of orientation

• Increases collision energy but does not increase favorability of orientation.

• Increases favorability of orientation but does not increase collision energy.

• Decreases favorability of orientation

Tags

NGSS.HS-PS1-5

If a collision between molecules is very gentle, the molecules are

• More likely to be favorably oriented.

• Less likely to be favorably oriented

• More likely to react.

• More likely to rebound without reacting.

• More likely to collide

To have an effective collision, the following are required

• Sufficient energy

• A favorable orientation

• Low temperature

• A reaction mechanism

• Sufficient energy and a favorable orientation

Which of the following best describes a reaction rate

• the change in temperature of a reactant or a product per second

• the change in the concentration of a reactant per unit of time

• The amount of time for a reaction to be begin

• The appearance of colour for a reaction per mole

• The moles of product that are produced per liter

Tags

NGSS.HS-PS1-5

A short-lived structure formed during a collision is referred to as:

• Activated Complex

• Reagent

• Catalyst

• Reactant

• Product

What takes place when an activated complex is formed

• Reactants are produced

• Bonds are broken

• Bonds are formed and broken

• A catalyst is made

• Energy is released