Given what we know about the relationship between the pressure and temperature of an enclosed gas, two assumptions we can make about the experiment performed by the student is that the volume of the enclosure will remain constant and that the amount of gas between each trial will also remain constant.
When performing an experiment to study the pressure-temperature relationship of a gas, we can always assume that the factors mentioned above will remain constant. In order to measure the data desired by the student, he will have to use the Ideal Gas law formula.
Given that this formula includes:
as variables to be considered in order to make calculations, we must assume that volume and the amount of gas will remain constant. Otherwise, the results will not be accurate as we will not know if these changes affected the pressure or temperature the student has measured.
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