Chapter 18.1-18.2

Which factor does NOT affect the rate of a chemical reaction?

• particle size

• concentration

• temperature

• molar mass

True or False – Lowering temperature usually slows down a reaction.

True or False – An increase in particle size speeds up a reaction.

Catalysts permit reactions to proceed _______________

• along a higher energy path.

• along a lower energy path.

• and increase product yield.

• and decrease product yield.

The actual order of a reaction must be determined by _______________.

• experiment

• a reaction mechanism

• collision theory

• Le Chatelier’s principle

True or False – All chemical reactions consist of two or more elementary reactions. _______

A(n) __________ is a measure of how much something changes within a specified amount of time.

• inhibitor

• activation energy

• activated complex

• rate

In chemistry, the rate of a chemical reaction, or the reaction rate, is usually expressed as the _____________ in the amount of reactant or product per unit time.

According to collision theory, atoms, ions, and molecules can react to form products when they collide if the particles have enough _________________ energy .

• molecular

• potential

• kinetic

• atomic

The minimum energy that colliding particles must have in order to react is called the _____________ energy.