SHS-Chemical Kinematics Part 1 by Canonigo

This slide presentation discusses the initial part of chemical kinematics for grade 12 STEM students.

1. UDM PRAYER
Almighty God, creator and giver of life
We give You thanks and vow to seek Your light
Through the knowledge that we gain and impart with our peers
In our University

Grant us forgiveness for the sins we confess
And give us strength to discern what is best
Four ourselves, and more so, for the benefit of others

Teach us to have grateful hearts and enlightened minds
As we learn and share our talents to the community

For the greater good and a brighter future
Of the City of Manila and our country

All these for your greater glory.
Amen.

2. GENERAL
CHEMISTRY 2
CHEMICAL KINETICS

3. Describe how various factors influence the rate of
reaction
Write the mathematical relationship among the
rate of reaction, the rate constant, and
concentration of the reactants.
Write the rate law for the first-order reaction.
At the end of the lesson students should be able to:

4. ACTIVITY : FACT OR BLUFF
Tell Fact if the statement is true. while Bluff if the statement is False.

5. ACTIVITY : FACT OR BLUFF
Tell Fact if the statement is true. while Bluff if the statement is False.
The Human Body is an
open system

6. ACTIVITY : FACT OR BLUFF
Tell Fact if the statement is true. while Bluff if the statement is False.
The Human Body is an
open system

7. ACTIVITY : FACT OR BLUFF
Tell Fact if the statement is true. while Bluff if the statement is False.
The earth is a closed
system.

8. ACTIVITY : FACT OR BLUFF
Tell Fact if the statement is true. while Bluff if the statement is False.
The earth is a closed
system.

9. ACTIVITY : FACT OR BLUFF
Tell Fact if the statement is true. while Bluff if the statement is False.
Work is done on the system to increase the
temperature from a lower temperature to a
high temperature.

10. ACTIVITY : FACT OR BLUFF
Tell Fact if the statement is true. while Bluff if the statement is False.
Work is done on the system to increase the
temperature from a lower temperature to a
high temperature.

11. ACTIVITY : FACT OR BLUFF
Tell Fact if the statement is true. while Bluff if the statement is False.
Entalphy is a state function

12. ACTIVITY : FACT OR BLUFF
Tell Fact if the statement is true. while Bluff if the statement is False.
Entalphy is a state function

13. ACTIVITY : FACT OR BLUFF
Tell Fact if the statement is true. while Bluff if the statement is False.
Heat capacity is numerically
equal to specific heat.

14. ACTIVITY : FACT OR BLUFF
Tell Fact if the statement is true. while Bluff if the statement is False.
Heat capacity is numerically
equal to specific heat.

15. ACTIVITY: MATCHMAKING

16. Direction: match the the correct answer on each
statements.

17. The rate of a reaction depends on
the chemical nature of the participating
The rates of many reactions depend
on the concentrations of the reactants
Reactions in phases that easily mix,
such as gases and liquids, occur much
faster than reactions between solids
Chemical reactions typically occur
faster at higher temperatures
A catalyst is a substance that increases
the rate of a chemical reaction without
itself being consumed the reaction
Chemical Nature
Physical Nature
Catalyst Presence
Heat
Concentration
Temperature

18. The rate of a reaction depends on
the chemical nature of the participating
The rates of many reactions depend
on the concentrations of the reactants
Reactions in phases that easily mix,
such as gases and liquids, occur much
faster than reactions between solids
Chemical reactions typically occur
faster at higher temperatures
A catalyst is a substance that increases
the rate of a chemical reaction without
itself being consumed the reaction
Chemical Nature
Physical Nature
Catalyst Presence
Heat
Concentration
Temperature

19. The rate of a reaction depends on
the chemical nature of the participating
The rates of many reactions depend
on the concentrations of the reactants
Reactions in phases that easily mix,
such as gases and liquids, occur much
faster than reactions between solids
Chemical reactions typically occur
faster at higher temperatures
A catalyst is a substance that increases
the rate of a chemical reaction without
itself being consumed the reaction
Chemical Nature
Physical Nature
Catalyst Presence
Heat
Concentration
Temperature

20. The rate of a reaction depends on
the chemical nature of the participating
The rates of many reactions depend
on the concentrations of the reactants
Reactions in phases that easily mix,
such as gases and liquids, occur much
faster than reactions between solids
Chemical reactions typically occur
faster at higher temperatures
A catalyst is a substance that increases
the rate of a chemical reaction without
itself being consumed the reaction
Chemical Nature
Physical Nature
Catalyst Presence
Heat
Concentration
Temperature

21. The rate of a reaction depends on
the chemical nature of the participating
The rates of many reactions depend
on the concentrations of the reactants
Reactions in phases that easily mix,
such as gases and liquids, occur much
faster than reactions between solids
Chemical reactions typically occur
faster at higher temperatures
A catalyst is a substance that increases
the rate of a chemical reaction without
itself being consumed the reaction
Chemical Nature
Physical Nature
Catalyst Presence
Heat
Concentration
Temperature

22. The rate of a reaction depends on
the chemical nature of the participating
The rates of many reactions depend
on the concentrations of the reactants
Reactions in phases that easily mix,
such as gases and liquids, occur much
faster than reactions between solids
Chemical reactions typically occur
faster at higher temperatures
A catalyst is a substance that increases
the rate of a chemical reaction without
itself being consumed the reaction
Chemical Nature
Physical Nature
Catalyst Presence
Heat
Concentration
Temperature

23. EXPERIMENT:

24. GUIDE
QUESTION
What happened when the
hydrogen peroxide, and yeast
were mixed and sealed in the
beaker?

25. What did you observe
after the yeast was
added to the mixture?

26. Yeast contains
enzymes. Why are
enzymes considered
as catalyst?

27. What are the products
formed when the
hydrogen peroxide
decomposes?

28. SCIENCE AND
SOCIETY: THE IMPACT
OF RESEARCH
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pariatur. Excepteur sint occaecat cupidatat non proident, sunt in
culpa qui officia deserunt mollit anim id est laborum.

29. refers to the study of the rates and mechanisms of
chemical reaction. In the study of the chemical
kinetics, note that the system is not in equilibrium.
What is Chemical Kinetics?

30. So far, we have considered a wide range of
possible chemical reactions and described
them using chemical equations and
stoichiometry. In reality, knowing how fast a
reaction will occur - and how to control that
speed - is just as important as knowing whether
it will occur at all.

31. Speed of reaction is determined by its reaction
rate, which is a measure of how quickly
reactants are consumed and products are
formed. Chemical Kinetics is the study of
reaction rates.

32. Speed of reaction is determined by its reaction
rate, which is a measure of how quickly
reactants are consumed and products are
formed. Chemical Kinetics is the study of
reaction rates.

33. The central theory of kinetics is collision
theory. The premise of this theory is simple:
molecules have to collide to react. Therefore,
the speed at which a reaction takes place
depends on two main factors:

34. The frequency of collisions - The more often molecules collide
with each other, the faster the reaction proceeds.

The energy of collisions - The more forcefully molecules collide
with each other, the more likely they are to react, and the faster
the reaction proceeds.
Two types of the collision theory

35. The frequency of collisions - The more often molecules collide
with each other, the faster the reaction proceeds.

The energy of collisions - The more forcefully molecules collide
with each other, the more likely they are to react, and the faster
the reaction proceeds.
Two types of the collision theory

36. Five factors that affect the rates of chemical reactions: the
chemical nature of the reacting substances, the physical
state of the reactants, the temperature of the reactants, the
concentration of the reactants, and the presence of a
catalyst.
Factors Affecting Rates of Reaction

37. .The rate of a reaction depends on the chemical nature of
the participating substances. Reactions that appear similar
may have different rates under the same conditions,
depending on the identity of the reactants
CHEMICAL NATURE

38. Reactions in phases that easily mix, such as gases and
liquids, occur much faster than reactions between solids.
The extent of mixing of the reactants influences the
frequency of molecular collisions - if reactants are more
thoroughly mixed, the molecules will collide more often and
thus react faster.
PHYSICAL STATE

39. Chemical reactions typically occur faster at higher
temperatures. Food can spoil quickly when left on the
kitchen counter. However, the lower temperature inside of
a refrigerator slows that process so that the same food
remains fresh for days. he reason goes back to molecular
collisions.
TEMPERATURE

40. The rates of many reactions depend on the concentrations
of the reactants. Rates usually increase when the
concentration of one or more of the reactants increases
because molecular collisions become more frequent when
more reactant molecules exist in the same space
CONCENTRATION

41. Another way to speed up a reaction is to use a catalyst. A
catalyst provides an alternative pathway of lower activistion
oof energy. It increase the rate of reaction but is not used up
in reaction.
PRESENCE OF CATALYST

42. PRESENCE OF CATALYST

43. The common types of catalyst are enzymes, acid
base catalyst, and heterogeneous
or surface catalyst. Enzymes are usually
associated with catalyzing biochemical reaction.
Acid-base catalyst uses acid base to catalyze
chemical reaction

44. Chemical kinetics relates to many aspects of
cosmology, geology, biology, engineering, and even
psychology and thus has far-reaching implications.
The principles of chemical kinetics apply to purely
physical processes as well as to chemical reactions.

45. ACTIVITY: CHEMICAL FACTOR
Which of factor that influence reaction rates
is involved in each the following.
1. A brush (grass) fire spreads more rapidly on a windy day than on a still day.
2. Sodium reacts more rapidly with water than iron does.
3.Powdered zinc reacts more rapidly with sulfuric acid than a large piece of zinc of
equal weigh does.
4.It is more dangerous to drop a lighted match into a gasoline tank that has just been
emptied than into one which is completely full.
5.Cake batter will cook only when heated.

46. Direction: Read the questions carefully and write the letter of your answers .
1. The rate of a reaction depends on __________.
a. collision frequency
b. collision orientation
c. collision energy
d. all of the above

47. 2. Which of the following conditions shall correctly
complete the statement?
__________ will lower the activation energy for a reaction.
a. Increasing the concentrations of reactants
b. Raising the temperature of the reaction
c. Adding a catalyst for the reaction
d. Removing products as the reaction proceeds

48. 3. The minimum amount of energy needed to
start a reaction is called the
a. activation energy.
b. energy of reaction.
c. entropy of reaction
d. reaction mechanism energy

49. 4. 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. behaves as a catalyst
b. supplies the activation energy
c. is part of the rate determining step
d. lowers the activation energy barrier

50. 5. Which of the following statements is typically true for a
catalyst?
I. The concentration of the catalyst will go down as the
reaction proceeds.
II. The catalyst provides a new pathway in the reaction
mechanism.
III. The catalyst speeds up the reaction.
a. I only
b. II only
c. I and II
d. II and III

51. THANK YOU
VERY MUCH!