Review Sheet Chapter 11

What are the 5 factors affecting the reaction rate?

1. Nature of reactants 2. Concentration of Reactants 3.Temperature of Reactants 4. Catalyst 5. Surface Ares

Outside the body, sugar burns at temps about 600 degrees C , but inside the body sugar burns at normal body temperature, which is 37 degrees C. How is this possible?

Catalysts increase the rate of a reaction by lowering the required amount of energy to acheive effective collisions.

_________ _________ is the study of reaction rates.

Chemical Kinetics

Brackets around a formula represent _________.

Concentration

________ Work as catalysts in our bodies.

Enzymes

Use the collision theory to explain why an increase in temperature increases the reaction rate.

Increasing the energy of reactants creates more effective collisions which increases the rate of reaction.

_________ Principle states that when a stress is applied to an system in equlibrium, the system reacts to _________ the stress.

LeChatelier's, reduce

In a state of chemical equilibrium, the forward and reverse reactions are proceeding at the same _______.

Rate

Chemical Kinetics is the study in which the rates of the _______ disappear and the _________ appear.

Reactants, products

Why do you think that industrail chemists are concerned with reaction rates?

Reaction rates determine how quickly the products are formed. The more products formed, the greater the revenue!

Double arrows in an equation mean that the equation is _______.

Reversible

Use the chemical theory to explain why iron filings rust faster than iron wire.

Smaller peices of an object have a greater surface area which allows a greater reaction to occur.

Use the collision theory to explain a mixture of hydrogen gas and chlorine gas reacts faster when the volume they occupy is decreased.

The decreasing volume increases pressure and allows the gas molecules to move faster together. At a higher speed, more collisions occur and the reaction can increase in speed.

The basic premise of the collision theory is that particles must first __________ if a reaction is to occur. Additionally, that __________ must be effective.

collide, collision

To be effective in a reaction, the particles must collide with the ________ _________ and the proper amount of_______.

correct orientation, energy