15. Chemical Kinetics
Catalyst
7:24
Practice this topic
- Multiple Choice
Which 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.
2085views17rank - Multiple ChoiceWhich of the following is true about a catalyst?1399views1rank
- Textbook Question
In the following three instances, which choice is greener in a chemical process? Explain. (a) A reaction that can be run at 350 K for 12 h without a catalyst or one that can be run at 300 K for 1 h with a reusable catalyst.
379views - Textbook Question
(c) Do catalysts affect the overall enthalpy change for a reaction, the activation energy, or both?
574views - Textbook Question
(a) Most commercial heterogeneous catalysts are extremely finely divided solid materials. Why is particle size important?
522views - Textbook Question
Many heterogeneous catalysts are deposited on high-surfacearea supports. Why?
625views1rank - Multiple ChoiceAt 300 K, a catalyst lowers the activation barrier from 20 kJ/mol to 10 kJ/mol. Which of the following statements is true regarding the rate constant for the catalyzed reaction compared to the uncatalyzed reaction? (R = 8.314 J mol⁻¹ K⁻¹)677views
- Multiple ChoiceWhy are enzymes referred to as catalysts in biochemical reactions?583views