Why is it important to release and remeasure gas during mass measurement?

AI Thread Summary
In mass measurement for gases, it is essential to measure the gas, release some, and measure it again to establish a linear relationship between volume and mass. This process allows for accurate calibration of measurements, particularly when gas is collected in a glass tube over water. The initial measurement provides a baseline, while the subsequent measurement after releasing some gas helps to confirm the consistency and reliability of the data, ensuring that the volume of gas corresponds accurately to its mass. This method is crucial for achieving precise results in gas analysis and understanding gas behavior under varying conditions.
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During mass measurement for a gas, why must you measure the gas, release some, and measure it again?
 
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You have to provide more context. How are you doing the measurement ?
 
The gas is collected in a glass tube over water.
 
z-component said:
During mass measurement for a gas, why must you measure the gas, release some, and measure it again?
I think (but do not hold me to it) that it is so you can create a linear scale for the voume related to the mass.

Most likely this is wrong though.

The Bob (2004 ©)
 

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