About

I made ScienceFix.com to share my favorite demos that I do in my middle school science classes.  

Contact Me
Search ScienceFix.com
Twitter
Delicious
Media that I like...
  • Something Funny Happened on the Way to the Moon
    Something Funny Happened on the Way to the Moon
    by Sara Howard
  • NOVA - Origins
    NOVA - Origins
    starring Neil Degrasse Tyson
  • Human Body: Pushing the Limits
    Human Body: Pushing the Limits
    starring Bray Poor
« Lesson: Rainbow Volume | Main | Video Demo: Water Up »
Monday
Jul272009

Video Demo: Reaction Chamber

This is a demo that I only show the video. This is an example of what happens in the reaction chamber of a liquid fuel rocket. I use about 100 ml of denatured alcohol. I pour it into the 5 gallon plastic bottle. I swirl it around vigorously, trying to speed up the evaporation of the alcohol. I pour out the excess liquid alcohol. I then set the bottle on the counter, making sure it is flat. With a candle attached to the end of the meter stick, I insert the candle in the opening of the bottle. Again, I only show the video of this to my students and don’t do it live. It demonstrates the volatile reaction that occurs with oxygen in the air. The resultant hot gasses funnel through the opening (nozzle on a rocket) at a higher speed. This demo also shows when the particles of a chemical are spread out (increased surface area), the speed of a reaction increases.

ONLY TEACHER DEMO! I ONLY RECOMMEND TO TEACHERS THAT THEY ONLY SHOW THIS VIDEO IN CLASS AND DON’T DO THE DEMO IN CLASS. NEVER, EVER USE A GLASS BOTTLE! ONLY USE A PLASTIC BOTTLE.


PrintView Printer Friendly Version

EmailEmail Article to Friend

Reader Comments

There are no comments for this journal entry. To create a new comment, use the form below.

PostPost a New Comment

Enter your information below to add a new comment.

My response is on my own website »
Author Email (optional):
Author URL (optional):
Post:
 
Some HTML allowed: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <code> <em> <i> <strike> <strong>