The first accurate measurements of the properties of high-pressure gases were made by E. H. Amagat in France between 1869 and 1893. Before developing the dead-weight gauge, he worked in a mineshaft and used a mercury manometer for measurements of pressure to more than 400 bar. Estimate the height of manometer required.
What will be an ideal response?
We know that 1 bar is equal to 750 torr or 750 mm of Hg or 0.75 meters of mercury. So to measure a pressure of 400 bar, he needed a column of mercury 400 bar * 0.75 m Hg/bar = 300 m of mercury.
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