Catalysts
Understanding catalysts is essential in chemistry as they speed up reactions without being consumed.
Quiz(13 vragen)
1. What effect do catalysts have on activation energy?
Termen in deze set(15)
What is a catalyst?
A substance that increases the rate of a chemical reaction without being consumed.
True or false: Catalysts are used up in the reaction.
False, because catalysts remain unchanged after the reaction.
Difference between homogenous and heterogeneous catalysts
Homogenous catalysts are in the same phase as reactants; heterogeneous are in different phases.
What is an enzyme?
A biological catalyst that speeds up biochemical reactions in living organisms.
Fill in the blank: Catalysts lower the ____ of a reaction.
activation energy
How do catalysts work?
By providing an alternative reaction pathway with lower activation energy.
What is an example of a catalyst in industry?
Platinum in catalytic converters for cars reduces harmful emissions.
True or false: All catalysts are enzymes.
False, because not all catalysts are biological.
Name a common catalyst used in the Haber process.
Iron is used to catalyze the synthesis of ammonia.
What does a catalyst do to reaction equilibrium?
It speeds up the rate of reaching equilibrium but does not change the position.
Fill in the blank: Catalysts can be ____ or ____.
organic; inorganic
What is a catalytic converter?
A device in vehicles that uses catalysts to convert harmful gases into less harmful emissions.
True or false: Catalysts can be reused multiple times.
True, because they are not consumed in the reaction.
Difference between activation energy and catalyst effect
Activation energy is the energy needed to start a reaction; catalysts lower this energy.
What role do catalysts play in the environment?
They help in processes like pollution reduction and recycling.
Vragen in deze set(13)
1. What effect do catalysts have on activation energy?
2. Which of the following is NOT a catalyst?
3. What do enzymes specifically catalyze?
4. In what phase are homogenous catalysts found?
5. What happens to a catalyst after a reaction?
6. Which catalyst is commonly used in catalytic converters?
7. Which of the following statements is true about catalysts?
8. How do catalysts affect the rate of reaction?
9. What is the main purpose of a catalytic converter?
10. What role does temperature play in catalysis?
11. What type of catalysts are used in solid-state reactions?
12. Which of the following is a feature of enzymes?
13. What does the term 'catalytic efficiency' refer to?
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