15. Chemical Kinetics
Catalyst
15. Chemical Kinetics
Catalyst - Video Tutorials & Practice Problems
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Catalyst is a substance that increases the rate of reaction by lowering the Activation Energy (Ea) of a reaction.
Catalyzed vs Uncatalyzed Reactions
1
concept
Catalyst Concept 1
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2
example
Catalyst Example 1
Video duration:
4mPlay a video:
3
Problem
ProblemWhich of the following statements is true regarding the energy diagram provided?
i. The reaction is endothermic.
ii. Activation energy would be less than + 10 kJ after a catalyst is added.
iii. The reaction absorbs energy.
iv. Activation energy would be greater than + 10 kJ after a catalyst is added.
a) I only b) II only c) I and III d) II, III and IV
A
I only
B
II only
C
I and III
D
II, III and IV
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PRACTICE PROBLEMS AND ACTIVITIES (16)
- In the following three instances, which choice is greener in a chemical process? Explain. (a) A reaction that ...
- (c) Do catalysts affect the overall enthalpy change for a reaction, the activation energy, or both?
- (a) Most commercial heterogeneous catalysts are extremely finely divided solid materials. Why is particle size...
- Many heterogeneous catalysts are deposited on high-surfacearea supports. Why?
- Suppose that the reaction A¡products is exothermic and has an activation barrier of 75 kJ>mol. Sketch an en...
- One of the many remarkable enzymes in the human body is carbonic anhydrase, which catalyzes the interconversi...
- Comment on the following statement: 'A catalyst increases the rate of a reaction, but it is not consumed beca...
- Why doesn't a catalyst appear in the overall chemical equation for a reaction?
- How are the following aspects of a reaction affected by the addition of a catalyst?
- A substance that influences the reaction but does not participate in the reaction is a
- Enzymes are catalysts because they lower the ______________ of a chemical reaction.
- A(n) ___ is a substance that speeds up a chemical reaction without being used up in the reaction.
- A ___ is a substance that speeds up a chemical reaction without being used up in the reaction.
- What are the roles of hydrogen peroxide oxygen hydrogen and catalase in the following reaction?
- A substance that accelerates any chemical reaction but is not consumed in the reaction is a _____.
- A catalyst is not a product or a reactant of a chemical reaction why not