How to speed up chemical reactions (and get a date) - Aaron Sams

TED-Ed
18 Jun 201204:55

Summary

TLDRIn this creative and humorous educational video, chemist Harriet uses a high school collision story to illustrate ways to speed up chemical reactions. The key to both getting a date and accelerating reactions is the right collision, requiring correct orientation and sufficient energy. The video proposes five parallel strategies for schools and chemistry: smaller hallways for more collisions, increased student population, reduced time between classes to raise 'collision' energy, discouraging students from traveling in packs to increase surface area, and introducing a 'matchmaker' or catalyst to lower activation energy.

Takeaways

  • 🧪 Harriet, the chemist, is trying to speed up a chemical reaction and recalls five methods from her high school days.
  • 🏫 The story of Harriet's high school collision with Harold is used as a metaphor for understanding chemical reaction rates.
  • 📚 The collision that led to a date for the dance is likened to the conditions needed for effective chemical reactions: correct orientation and sufficient energy.
  • 🔍 The script draws parallels between social interactions in high school and the principles of chemical kinetics.
  • 🤝 The five methods to increase the likelihood of a 'date' are proposed as analogous to ways to speed up chemical reactions.
  • 🏢 Shrinking hallways is compared to lowering the volume of a reaction vessel, increasing the frequency of particle collisions.
  • 🌐 Increasing the school population is akin to increasing the number of reactant particles, leading to more potential collisions.
  • ⏰ Reducing the time between classes is like raising the temperature of a reaction mixture, adding energy to the system.
  • 👫 Encouraging students to not travel in packs increases the exposed surface area for collisions, similar to breaking up clumps of particles in a reaction.
  • 💑 Hiring a matchmaker is compared to using a catalyst in chemistry, which lowers the activation energy needed for a reaction to occur.

Q & A

  • What is Harriet's profession?

    -Harriet is a chemist.

  • What does Harriet need to occur more quickly in her work?

    -Harriet needs a chemical reaction to occur more quickly.

  • How many ways does Harriet know to speed up a chemical reaction?

    -Harriet knows of five ways to speed up a chemical reaction.

  • What event from Harriet's high school days does she recall to remember the ways to speed up reactions?

    -Harriet recalls the day she got a date for the dance after colliding with Harold in the hallway.

  • What were the two important characteristics of the collision that led to a date for the dance?

    -The collision needed to have the correct orientation to knock the books out of Harriet's hands and enough energy to do so.

  • What is the first proposed change to increase the likelihood of book-dropping collisions in schools?

    -The first proposed change is to shrink the size of the hallways.

  • How does increasing the overall population of the school relate to chemical reactions?

    -Increasing the overall population of the school, like increasing the number of particles in a reaction, can lead to more collisions.

  • What is the analogy between reducing the time allowed between classes and a chemical reaction?

    -Reducing the time between classes, causing students to move more quickly, is analogous to increasing the temperature of a reaction mixture, which increases the kinetic energy of particles.

  • Why should students stop traveling in packs according to the script?

    -Students should stop traveling in packs to increase their exposed surface area for potential collisions, similar to how breaking up clumps of particles increases the total surface area available for reactions.

  • What role does a matchmaker play in the analogy, and how does it relate to catalysts in chemistry?

    -A matchmaker facilitates easier connections between students, similar to how a catalyst lowers the activation energy required for a chemical reaction by bringing particles together and orienting them correctly.

  • What are the five methods described to accelerate both the process of getting a date for the dance and making a chemical reaction occur?

    -The five methods are: 1) Shrink hallways, 2) Increase school population, 3) Reduce time between classes, 4) Stop traveling in packs, and 5) Hire a matchmaker (catalyst).

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Related Tags
Chemistry LessonsHigh SchoolRomanceEducationalHumorousScienceCollisionsReactionsCatalystsSpeed Dating