Collision theory and activation energyIB MYP Chemistry: Flashcards
What these 14 flashcards ask
- What is collision theory?
- What is activation energy?
- What is a successful collision?
- What do the rate of reaction and successful collisions have in common?
- How does increasing concentration affect collisions?
- Does concentration change the energy of the particles?
- What are the two effects of raising the temperature?
- How does a catalyst work?
- Is a catalyst used up?
- Why are catalysts useful in industry?
- Name the catalyst used in the Haber process.
- What is an enzyme?
- Why are enzymes specific?
- What does denatured mean?
Exam questions on Collision theory and activation energy
- A class in Kuala Lumpur uses a model in which students walk around a hall as particles. Pairs of students sometimes collide, but only some of the collisions are counted as a reaction.State two conditions that must be met for a collision between particles to be successful.2 marks
- A pupil in Chennai reacts magnesium ribbon with dilute hydrochloric acid. She then repeats the experiment with a more concentrated acid, and later with the original acid warmed to a higher temperature.Explain, using ideas about collisions, why the rate of this reaction falls as it proceeds.2 marks
- A brewery in Dublin uses yeast to convert sugar into ethanol and carbon dioxide at about 30 °C. Yeast cells contain enzymes. The company's chemical plant next door makes other products using metal catalysts.Explain how a catalyst increases the rate of a reaction.3 marks
Written by the Exaim team, led by Shaun Daswani (Head of Upper Secondary, Improve ME Institute; MSc Financial Mathematics, Imperial College London; BSc, UCL) and Jason Daswani (operational lead, Improve ME Institute; LSE).