Name______
CHEMISTRY: A Study of Matter Reaction Rates: http://link.brightcove.com/services/player/bcpid9113583001?bctid=1405713920
Note Taking Guide: Episode 1201
reaction rate:
1. the change in ______of the ______per unit time
2. speed at which ______disappear and ______appear
The study of reaction rates is called ______.
ü In order for a reaction to occur, reacting ______must ______effectively.
ü In an ______collision, the ______particles collide with the correct ______and the proper amount of ______.
Factors Affecting Reaction Rates:
a. ______of reactants-
· The ______of the reactants, types of ______involved, and state of ______all affect reaction rates.
b. ______of reactants-
· Increasing the concentration of reactants → more ______collisions → increased ______of reaction
· Increasing the ______of the reactants ( ______only) → increases the ______of reactants → increases ______.
c. ______of reactants-
· increasing ______of reactants → more ______→ increased ______of reaction.
d. ______-
· a substance that ______the rate of a reaction without being permanently ______
· increases the rate of a reaction by ______the required amount of ______to achieve ______collisions
e. ______area of reactants-
· increasing surface ______→ more ______→ increased ______of reaction.
1. A study of reaction ______is called chemical ______.
2. Reaction rate refers to how quickly or slowly the ______disappear and the ______appear. It is measured in terms of the ______of the reactants.
3. If a reaction is to occur, reacting particles must first ______and this ______must be effective. What are the TWO characteristics of an effective collision?
4. What are the FIVE major factors that affect reaction rate?
5. Why would a mixture of gases react faster when the volume they occupy is decreased?
6. Why would iron filings rust faster than an iron nail?
7. What is the effect of a catalyst on the required energy to achieve effective collisions?
8. ENZYMES act as catalysts in our bodies. Enzymes are generally made from proteins (amino acid polymer). Have you ever noticed that your hands seem to get “stiff” when they get cold? The reason is that these enzyme reactions causing the muscles to contract ______down when your hands are cold so you can’t contract your muscles as fast and your hands feel stiff!
Decreasing temperature (decreases, increases) the rate of reaction.
9. Enzymes are in molds and bacteria that spoil food. Explain, using your knowledge of factors affecting the rate of reaction, why food doesn’t spoil as fast when it is refrigerated as it would at room temperature.
10. Due to decomposition reactions with oxygen or carbon dioxide in the air, meat begins to feel slimy and smell spoiled. Explain, using your knowledge of chemical kinetics, why meat spoils less rapidly when left unsliced.
11. Based on your knowledge of factors affecting the rate of reaction, why is there a danger of explosions in places such as silos and coal mines where there are large quantities of powdered, combustible materials?