The Open Door Web Site
HOME PAGE BIOLOGY CHEMISTRY PHYSICS ELECTRONICS HISTORY HISTORY of SCI & TECH MATH STUDIES LEARN FRENCH STUDY GUIDE PHOTO GALLERY
ATOMIC and NUCLEAR ELECTRICITY and MAGNETISM MEASUREMENTS MECHANICS OPTICS PRACTICAL WORK QUESTIONS RELATIVITY THERMAL PHYSICS WAVES
PRACTICAL WORK
Google
Custom Search
Thermal Physics
 
Aim: to Verify the Boyle-Marriotte Law
See the Boyle-Marriotte Law
 
The diagram below shows a piece of apparatus specially designed for this investigation.
Many variations exist but they all make the experiment pretty easy to perform.
 
Method
The volume occupied by the gas is changed by turning the screw which pushes more or less mercury into the manometer.
 
The pressure of the gas (in cmHg) = atmospheric pressure + h
If a barometer is not available, assume that atmospheric pressure = 76 cmHg.
 
The volume of the gas can not easily be measured but you can assume that the tube containing the gas is of uniform cross-section.
Therefore, readings of the length h and can be used to verify the law.
Changes of pressure and volume should be made slowly*. Why?
 
Use your results to plot a graph which will show (hopefully) the the law has been verified. 
 
*if you have apparatus similar to that in the diagram, the changes will, inevitably be made slowly.
The Boyle/Marriotte law applies to gases at constant temperature.
Rapid changes in volume will cause non-negligible temperature changes.
 
 
You might find slightly more modern apparatus, as shown below.
If your apparatus is of exactly the same type as that shown above, then the tap placed in between the syringe and the barometer can be set in three different positions:
Here we use a syringe to contain the sample of air.
The syringe is connected to a digital barometer.
Changes in volume (and hence pressure) are again made slowly by turning the screw.
A similar graph (of pressure against 1/volume) can be plotted to verify the law.
 
SITE MAP
WHAT'S NEW
ABOUT
PRIVACY
COPYRIGHT
SPONSORSHIP
DONATIONS
ADVERTISING
 

© The Open Door Team
2016
Any questions or
problems regarding
this site should be
addressed to
the webmaster

David Hoult 2017

Hosted By
Web Hosting by HostCentric

 
SiteLock
 
 
Practicals Index Page