# IB Lab 23 Charles Law CE

Pages: 3 (485 words) / Published: Jan 12th, 2015
To Test Charles’ Law and estimate Absolute Zero

In this IB Lab you will be assessed on the following criterion

Conclusions and Evaluation

Aim:
Physics has many hundreds of laws and these can be tested in experiments to see if they are true. In 1787 the French scientist, J.A.C. Charles, published a law connecting the volume and temperature of gases. Your task is to see if you agree with his law. Another thing you have to consider is “ is my experiment accurate enough to prove or disprove the law ?“. It could be that the law is good but your experiment isn’t. This process of testing a proposed law with an experiment is one of the foundations of all science.

Apparatus:
Beaker, thermometer, capillary tube with plug of concentrated sulphuric acid, 30 cm ruler, Bunsen burner.

Diagram:

Method:
Put the capillary tube in the beaker as shown. Measure the length of the air below the plug in the capillary with a ruler. Slowly warm the water and approximately every 10 0C, measure the length of air again. Repeat this until the water is boiling. Make sure that the air column in the capillary tube is always below the level of the water.

Data Analysis:
Plot a graph of “length of air” against “temperature in 0C”.

Conclusion and Evaluation:
Give a conclusion and explanation of your results; compare to literature values.
Evaluate the above procedure (method) and apparatus used, including limitations, weaknesses or errors.
Identify any weaknesses and suggest ways of improving the investigation.
To Test Charles’ Law and estimate Absolute Zero (alternative)

In this IB Lab you will be assessed on the following criterion

Conclusions and Evaluation

Aim:
Physics has many hundreds of laws and these can be tested in experiments to see if they are true. In 1787 the French scientist, J.A.C. Charles, published a law connecting the volume and temperature of gases. Your task is to see if you agree with his law. Another thing you have to consider is “ is