In this lab, students were able to connect Work, Kinetic Energy, and Potential Energy, which is known as Internal Energy for gases, with the Ideal Gas Law. It was also found that the velocity can be calculated using Kinetic Energy and Ideal Gas Law equations. However, the velocity has resumed to be three: The average velocity that is the mean speed of a particle; the most probable velocity, which is the speed where a majority of the molecules move; and the root mean squared speed, which is simple the square root of the average velocity squared of the molecules in the gas. The students were able also to learn how the change in pressure and volume, and where the temperature will increase also can make a matter ignited.
This picture represents the calculation of the final temperature where a piece of paper would ignited. The experiment consists in a simple fire syringe. By taking the necessary measurements, such as initial length, final length after the total compression, both of the air column, the inner radius, calculating the initial and final volume, and the initial temperature, students were requested to find at what temperature the piece of paper would ignited. The initial temperature was 298 K, and the final one was 663 K. Although the calculated temperature had shown an increasing in temperature, the small piece of paper did not. One reason could be that the compression of the air inside the syringe was not fast enough; other one could be that the actually temperature to ignited the paper was higher than the one calculated.
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